CN105891101A - Detection device and method for steel bar macrocell corrosion in concrete - Google Patents
Detection device and method for steel bar macrocell corrosion in concrete Download PDFInfo
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- CN105891101A CN105891101A CN201610397694.6A CN201610397694A CN105891101A CN 105891101 A CN105891101 A CN 105891101A CN 201610397694 A CN201610397694 A CN 201610397694A CN 105891101 A CN105891101 A CN 105891101A
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Abstract
The invention discloses a detection device and method for steel bar macrocell corrosion in concrete. The device comprises two steel bar concrete corrosion detection units, and each steel bar concrete corrosion detection unit comprises a steel bar concrete composite structure, a pipeline and a wire, wherein the steel bar concrete composite structure comprises a concrete test block and a steel bar, the steel bar is arranged in center of the concrete test block, the portion, stretching out of the concrete test block, of the steel bar is provided with a sealing layer, one end of the steel bar is connected with the wire, hole channels are formed in the concrete test block, and the two ends of the hole channels are connected with the pipeline in a sealing mode; the two steel bar concrete corrosion detection units are arranged in a same containing vessel, water in contained in the containing vessel, and the wires of the two steel bar concrete corrosion detection units are communicated and provided with a switch. The detection device and method have the advantages that the structure is simple, operation is convenient, an analytical method is simple and clear, the microcell corrosion effect and the macrocell corrosion effect of the steel bars can be comprehensively and synthetically evaluated, and the control modes steel bar macrocell corrosion in various corrosion environments can be illustrated.
Description
Technical field
The invention belongs to reinforcement corrosion guard technology field, more particularly, it relates to the grand electricity of reinforcement in concrete
The detection apparatus and method of pond corrosion.
Background technology
Reinforced Concrete Materials because of its low cost, easily construct and there is good plasticity and durability, thus
It is widely used in various industrial civil building, water conservancy project or sea work structure.Generally in xoncrete structure,
The high alkalinity environment that hydrated cementitious produces, can make rebar surface form one layer of ferrum oxygen that can resist reinforcement corrosion
Compound protective layer.But, along with chloride ion, the nuisance such as sulfate ion and carbon dioxide is constantly from outside
Carrying out of the concrete structure crack that environment causes toward infiltration and external environment condition and load in concrete, this ferrum
Instability that protective oxide film gradually becomes and go to pot, and then excite the corrosion of reinforcing bar.
Research to Steel Corrosion In Concrete Structures at present, is based primarily upon micro-cell corrosion theoretical, by dividing
The half-cell prtential of analysis reinforcing bar and corrosion rate evaluate its corrosion condition, seldom theoretical based on macro cell corrosion,
Its corrosion condition is evaluated by analyzing the macro cell polarization characteristic of negative electrode reinforcing bar and anode reinforcing bar.Half-cell electricity
The Appreciation gist of position is ASTM C876 standard, and whether this standard pin is in passive state or corrosion to reinforcing bar
State, simply show a probability judgement, and this judgement suffers the impact of dry and wet environment the biggest；Secondly,
This standard is only applicable to alkalescence xoncrete structure, for carbonated concrete structure inapplicable, and works as coagulation
When soil structure exists macro cell corrosion, use half-cell prtential method will cause bigger erroneous judgement.By linear pole
Change the Corrosion Rate of Steel that impedance method, electrochemical impedance Atlas Method or electrochemical noise method obtain, usually used as
Micro-cell corrosion speed, this corrosion rate only just true rotten close to reinforcing bar when macro cell corrosion is left in the basket
Erosion speed.Owing to the true corrosion rate of reinforcing bar is micro-cell corrosion speed and macro cell corrosion speed sum, again
Owing to generally existing in the macro cell corrosion of active service Steel Bars in Concrete Structure, so using linear polarization
Impedance method and electrochemical impedance Atlas Method will underestimate the corrosion rate of reinforcing bar, affect reinforcement corrosion protection effect
Rational evaluation.Therefore theoretical based on micro-cell corrosion, by analyzing half-cell prtential and the corrosion speed of reinforcing bar
It is inaccurate and insecure that degree evaluates its corrosion condition.
In micro-cell corrosion, cathode chamber and anode region coexist alternately, and corrosion is also uniform；And
In the xoncrete structure of reality, cathode chamber and anode region are separate and apart from each other, and corrosion is not,
This formation making it easy to cause reinforcing bar macro cell corrosion.When reinforcing bar is under macro cell corrosion state, anode
The electronics of reinforcement corrosion release is transferred to negative electrode reinforcing bar and is consumed by negative electrode reinforcing bar, thus is formed from negative electrode
Reinforcing bar flows to the macro cell current of anode reinforcing bar, and then causes the corrosion potential of anode reinforcing bar towards positive potential side
(cloudy towards negative direction reduction to the corrosion potential increasing (the macro cell polarization of anode reinforcing bar) and negative electrode reinforcing bar
The macro cell polarization of pole reinforcing bar).Therefore the corrosion evaluating Steel Bars in Concrete Structure is considered as its macro cell corrosion
Polarization characteristic and control mechanism.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, for the problems referred to above, be proposed for concrete
The detection apparatus and method of middle reinforcing bar macro cell corrosion.Present configuration is simple, easily operated, it is possible to realize
The micro-cell corrosion state of reinforcing bar and the alternate cycles change of macro cell corrosion state, analyze cathode steel intuitively
Macro cell potential difference, macro cell corrosion electric current, negative electrode reinforcing bar and anode reinforcing bar between muscle and anode reinforcing bar
Polarization ratio and polarization slope, can the suppression to reinforcing bar macro cell corrosion of the effectively evaluating each corrosion protection technology
Effect, additionally it is possible to illustrate the control mechanism of reinforcing bar macro cell corrosion under various corrosive environment.
For realizing above-mentioned technical purpose, the present invention proposes following technical scheme:
A kind of armored concrete composite construction, including concrete test block and reinforcing bar, wherein: steel-bar arrangement is mixed
The middle position of solidifying soil test block；Along concrete test block length direction, reinforcing bar runs through whole concrete test block, and
Concrete test block is stretched out at reinforcing bar two ends；Arranging duct on concrete test block, described duct is uniformly arranged on one
On the individual reinforcing bar the to be arranged on concrete test block middle position circumference as the center of circle, and along concrete test block length
Direction, whole concrete test block is run through in duct.
In technique scheme, the quantity in duct is 26, preferably 46.
In technique scheme, a length of 160-200mm of concrete test block, width is 60-100mm, high
Degree is 60-100mm.
In technique scheme, a diameter of 6-20mm in duct, the distance of duct centre distance reinforcing steel bar center
For 6-20mm.
Use technique scheme, reinforcing bar and duct carried out position cooperation, simple in construction, easy to use and
Can effectively simulate the corrosive environment of reinforcing bar, it is simple to the research to reinforcement corrosion.
For the armored concrete composite construction of corrosion test, including armored concrete composite construction, pipeline,
Wire, wherein: armored concrete composite construction, including concrete test block and reinforcing bar, steel-bar arrangement is at coagulation
The middle position of soil test block；Along concrete test block length direction, reinforcing bar runs through whole concrete test block, and steel
Concrete test block is stretched out at muscle two ends；Arranging sealant at the two ends of reinforcing bar, one end of reinforcing bar is connected with wire；
Arranging duct on concrete test block, described duct is uniformly arranged on one to be arranged on concrete test block
The reinforcing bar of middle position is on the circumference in the center of circle, and along concrete test block length direction, duct runs through whole mixed
The test block of solidifying soil；The two ends in duct are connected with seal for pipe joints respectively；Pipeline opening straight up, and pipeline tapping
Higher than concrete test block, it is full of duct realizing liquid.
In technique scheme, the quantity in duct is 26, preferably 46.
In technique scheme, a length of 160-200mm of concrete test block, width is 60-100mm, high
Degree is 60-100mm.
In technique scheme, a diameter of 6-20mm in duct, the distance of duct centre distance reinforcing steel bar center
For 6-20mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer.
In technique scheme, sealant covers the two ends of the reinforcing bar stretching out concrete test block, and extends to
Reinforcing bar in oversite concrete test block in concrete test block.
In technique scheme, in concrete test block, a length of 30-50mm of reinforcing bar that sealant covers.
Use technique scheme, utilize the pipeline of opening straight up to load solution (example to concrete test block
Such as Chloride Solution, water, mortar etc.), and utilize law of connected vessels make in pipeline liquid level higher than concrete test block,
To maintain solution diffusion in concrete test block, so the corrosion condition of follow-on test reinforcing bar, simple in construction,
Easy to use and can effectively simulate the corrosive environment of reinforcing bar, it is simple to the research to reinforcement corrosion.
A kind of steel reinforced concrete erosion test cell, including armored concrete composite construction, pipeline, wire,
Wherein: armored concrete composite construction, including concrete test block and reinforcing bar, steel-bar arrangement is at concrete test block
Middle position；Along concrete test block length direction, reinforcing bar runs through whole concrete test block, and reinforcing bar two ends
Stretch out concrete test block；Arranging sealant at the two ends of reinforcing bar, one end of reinforcing bar is connected with wire；
Arranging duct on concrete test block, described duct is uniformly arranged on one to be arranged on concrete test block
The reinforcing bar of middle position is on the circumference in the center of circle, and along concrete test block length direction, duct runs through whole mixed
The test block of solidifying soil；The two ends in duct are connected with seal for pipe joints respectively；Pipeline is connected with reserving liquid tank, and on pipeline
Pump and effusion meter are set, to realize by the one end in duct, liquid in reserving liquid tank is entered concrete test block, another
End flows out and is back to reserving liquid tank, utilizes the cooperation of pump and effusion meter, it is achieved to liquid in pipeline and hole simultaneously
The control of flow velocity and adjustment in road.
In technique scheme, the quantity in duct is 26, preferably 46.
In technique scheme, a length of 160-200mm of concrete test block, width is 60-100mm, high
Degree is 60-100mm.
In technique scheme, a diameter of 6-20mm in duct, the distance of duct centre distance reinforcing steel bar center
For 6-20mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer.
In technique scheme, sealant covers the two ends of the reinforcing bar stretching out concrete test block, and extends to
Reinforcing bar in oversite concrete test block in concrete test block.
In technique scheme, in concrete test block, a length of 30-50mm of reinforcing bar that sealant covers.
Use technique scheme, utilize pipeline, pump and effusion meter to load solution (such as to concrete test block
Chloride Solution, water, mortar etc.), and realize the direct control to flow velocity, brief introduction controls solution at concrete
Diffusion in test block, and then the corrosion condition of follow-on test reinforcing bar, simple in construction, easy to use and can have
The corrosive environment of effect simulation reinforcing bar, it is simple to the research to reinforcement corrosion.
The detection device of reinforcement in concrete macro cell corrosion, including two steel reinforced concrete erosion test cells,
Container, two of which steel reinforced concrete erosion test cell is arranged in same container, and
Container arranges water；Two steel reinforced concrete erosion test cell structures are identical, and each reinforced concrete
Soil corrosion test unit, including armored concrete composite construction, pipeline and wire, two armored concrete corruption
Erosion test cell selects structure or the second armored concrete of the first steel reinforced concrete erosion test cell
The structure of corrosion test unit: wherein
In the structure of the first steel reinforced concrete erosion test cell, armored concrete composite construction, including
Concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length side
To, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；Set at the two ends of reinforcing bar
Putting sealant, one end of reinforcing bar is connected with wire；Arranging duct on concrete test block, described duct is uniform
Be arranged on one with on the reinforcing bar circumference as the center of circle being arranged on concrete test block middle position, and along concrete
Test block length direction, whole concrete test block is run through in duct；The two ends in duct are connected with seal for pipe joints respectively；
Pipeline opening straight up, and pipeline tapping is higher than concrete test block, is full of duct realizing liquid；
In the structure of the second steel reinforced concrete erosion test cell, armored concrete composite construction, including
Concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length side
To, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；Set at the two ends of reinforcing bar
Putting sealant, one end of reinforcing bar is connected with wire；Arranging duct on concrete test block, described duct is uniform
Be arranged on one with on the reinforcing bar circumference as the center of circle being arranged on concrete test block middle position, and along concrete
Test block length direction, whole concrete test block is run through in duct；The two ends in duct are connected with seal for pipe joints respectively；
Pipeline is connected with reserving liquid tank, and arranges pump and effusion meter on pipeline, to realize liquid in reserving liquid tank by hole
The one end in road enters concrete test block, and the other end flows out and is back to reserving liquid tank, utilizes pump and effusion meter simultaneously
Cooperation, it is achieved control and the adjustment to liquid flow velocity in pipeline and duct；
Switch is set between two steel reinforced concrete erosion test cells, switch respectively with two armored concrete
Wire in corrosion test unit is connected.
In technique scheme, the quantity in duct is 26, preferably 46.
In technique scheme, a length of 160-200mm of concrete test block, width is 60-100mm, high
Degree is 60-100mm.
In technique scheme, a diameter of 6-20mm in duct, the distance of duct centre distance reinforcing steel bar center
For 6-20mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer.
In technique scheme, sealant covers the two ends of the reinforcing bar stretching out concrete test block, and extends to
Reinforcing bar in oversite concrete test block in concrete test block.
In technique scheme, in concrete test block, a length of 30-50mm of reinforcing bar that sealant covers.
The detection method of reinforcement in concrete macro cell corrosion, in a steel reinforced concrete erosion test cell
Reinforcing bar is anode reinforcing bar, and the reinforcing bar in another steel reinforced concrete erosion test cell is negative electrode reinforcing bar, according to
The following step is carried out:
Step 1, uses the water in flat vessel that two steel reinforced concrete erosion test cells are carried out moistening, with
Make between two steel reinforced concrete erosion test cells, to form the electricity general character；
In step 1, by all or part of for concrete test block in two steel reinforced concrete erosion test cells
It is immersed in the water, to simulate the macro cell corrosion of different humidity or underwater concrete, such as by two reinforced concretes
In soil corrosion test unit, concrete test block is immersed in the water 3-5mm.
Step 2, by pipeline injection experiments liquid in the duct of concrete test block；
In step 2, experimental liquid is Chloride Solution or corrosion inhibitor solution.
Step 3, uses determinator to be connected with steel reinforced concrete erosion test cell；
In described step 3, determinator is corrosion diagnosis instrument or steel bar corrosion instrument or electrochemical workstation
Or zero resistance galvanometer, in actual use, require to be attached according to the use of each determinator.
Step 4: disconnect the wire between negative electrode reinforcing bar and anode reinforcing bar, persistently measure the micro cell of negative electrode reinforcing bar
Corrosion potential Emi-cWith micro-cell corrosion electric current density imi-c, the micro-cell corrosion current potential E of anode reinforcing barmi-aWith
Micro-cell corrosion electric current density imi-a；
Step 5: connect the wire between negative electrode reinforcing bar and anode reinforcing bar, the macro cell of test constantly negative electrode reinforcing bar
Corrosion unit Ema-c, the macro cell corrosion current potential E of anode reinforcing barma-a, between negative electrode reinforcing bar and anode reinforcing bar flow
Dynamic macro cell corrosion electric current density ima=ima-c=ima-a；
Step 6: step 4 and step 5 are tried as a cycle period, repetition step 4 and step 5
Test.
In described step 4, anode reinforcing bar and cathode steel tendon breaking open state (i.e. micro-cell corrosion state)
Time is 24 weeks (i.e. one week is 7 days, and every day is 24 hours), in order to negative electrode reinforcing bar and anode reinforcing bar
Between the recovery of micro-cell corrosion state and stable.
In described step 5, anode reinforcing bar and the time of negative electrode reinforcing bar connection status (i.e. macro cell corrosion)
It is 24 weeks (i.e. one week is 7 days, and every day is 24 hours), in order to flow through negative electrode reinforcing bar and anode steel steel
Stablizing of macro cell corrosion electric current between muscle, and macro cell polarization stablize.
In described step 6, using step 4 and step 5 as a cycle period, an anode reinforcing bar and
Cathode steel tendon breaking open state and an anode reinforcing bar and negative electrode reinforcing bar connection status form a cycle period, time
Between be 48 weeks (i.e. one week is 7 days, and every day is 24 hours).
The present invention relative to prior art have the advantages that present configuration be simple and convenient to operate,
Analysis method is simple and clear, it is possible to micro-cell corrosion effect and macro cell corrosion effect to reinforcing bar are carried out comprehensively
Comprehensive evaluation, it is possible to illustrate the control model of reinforcing bar macro cell corrosion under each corrosive environment.
Accompanying drawing explanation
Fig. 1 is the structural representation (1) of the armored concrete composite construction in the present invention.
Fig. 2 is the structural representation (2) of the armored concrete composite construction in the present invention.
Fig. 3 is the structural representation of the armored concrete composite construction for corrosion test of the present invention.
Fig. 4 is the structural representation of the steel reinforced concrete erosion test cell of the present invention.
Fig. 5 is that the negative electrode reinforcing bar in the detection device of reinforcement in concrete macro cell corrosion disconnects with anode reinforcing bar
Attachment structure schematic diagram.
Fig. 6 is the negative electrode reinforcing bar in the detection device of reinforcement in concrete macro cell corrosion and anode bar connecting
Structural representation.
Fig. 7 is the detection method schematic diagram (1) of reinforcement in concrete macro cell corrosion.
Fig. 8 is the detection method schematic diagram (2) of reinforcement in concrete macro cell corrosion.
Wherein 1 is concrete test block, and 2 is duct, and 3 is reinforcing bar, 4 sealants, and 5 is screw, and 6 is plain cushion
Circle, 7 is wire, and 8 is plastic conduit, and 9 is flat vessel, and 10 is negative electrode reinforcing bar, and 11 is anode reinforcing bar,
12 is reserving liquid tank, and 13 is pump, and 14 is effusion meter, and 15 is switch.
Detailed description of the invention
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings:
As shown in figure 1 and 2, the armored concrete composite construction of the present invention, including concrete test block and steel
Muscle, wherein: steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length direction, reinforcing bar
Run through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；Concrete test block arranges duct,
Described duct is uniformly arranged on one with the reinforcing bar circumference as the center of circle being arranged on concrete test block middle position
On, and along concrete test block length direction, whole concrete test block is run through in duct.
In technique scheme, the quantity in duct is 4, lay respectively at the surface of reinforcing bar, underface,
Front-left and front-right, a diameter of 6mm, the distance of duct centre distance reinforcing steel bar center is 8mm；Concrete
The a length of 160mm of test block, width is 80mm, and height is 80mm.
As it is shown on figure 3, the armored concrete composite construction for corrosion test of the present invention, including such as Fig. 1
With the armored concrete composite construction shown in 2, pipeline, wire, wherein: armored concrete composite construction,
Including concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Long along concrete test block
Degree direction, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；At reinforcing bar two
End arranges sealant, and one end of reinforcing bar is connected with wire；
Arranging duct on concrete test block, described duct is uniformly arranged on one to be arranged on concrete test block
The reinforcing bar of middle position is on the circumference in the center of circle, and along concrete test block length direction, duct runs through whole mixed
The test block of solidifying soil；The two ends in duct are connected with seal for pipe joints respectively；Pipeline opening straight up, and pipeline tapping
Higher than concrete test block, it is full of duct realizing liquid.
In technique scheme, the quantity in duct is 4, lay respectively at the surface of reinforcing bar, underface,
Front-left and front-right, a diameter of 6mm, the distance of duct centre distance reinforcing steel bar center is 8mm；Concrete
The a length of 160mm of test block, width is 80mm, and height is 80mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer, and sealant covers and stretches out concrete examination
The two ends of the reinforcing bar of block, and the reinforcing bar extended in concrete test block in oversite concrete test block.At concrete
In test block, a length of 30mm of reinforcing bar that sealant covers.
As shown in Figure 4, a kind of steel reinforced concrete erosion test cell, including reinforcing bar as illustrated in fig. 1 and 2
Composite concrete structure, pipeline, wire, wherein: armored concrete composite construction, including concrete test block
And reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length direction, reinforcing bar passes through
Wear whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；At the two ends of reinforcing bar, sealant is set,
One end of reinforcing bar is connected with wire；
Arranging duct on concrete test block, described duct is uniformly arranged on one to be arranged on concrete test block
The reinforcing bar of middle position is on the circumference in the center of circle, and along concrete test block length direction, duct runs through whole mixed
The test block of solidifying soil；The two ends in duct are connected with seal for pipe joints respectively；Pipeline is connected with reserving liquid tank, and on pipeline
Pump and effusion meter are set, to realize by the one end in duct, liquid in reserving liquid tank is entered concrete test block, another
End flows out and is back to reserving liquid tank, utilizes the cooperation of pump and effusion meter, it is achieved to liquid in pipeline and hole simultaneously
The control of flow velocity and adjustment in road.
In technique scheme, the quantity in duct is 4, lay respectively at the surface of reinforcing bar, underface,
Front-left and front-right, a diameter of 6mm, the distance of duct centre distance reinforcing steel bar center is 8mm；Concrete
The a length of 160mm of test block, width is 80mm, and height is 80mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer, and sealant covers and stretches out concrete examination
The two ends of the reinforcing bar of block, and the reinforcing bar extended in concrete test block in oversite concrete test block.At concrete
In test block, a length of 30mm of reinforcing bar that sealant covers.
As shown in Fig. 16, the detection device of reinforcement in concrete macro cell corrosion, including two reinforced concretes
Soil corrosion test unit, container, two of which steel reinforced concrete erosion test cell is arranged on same
In container, and water is set in container；Two steel reinforced concrete erosion test cell structures are identical,
And each steel reinforced concrete erosion test cell, including armored concrete composite construction, pipeline and wire, two
Individual steel reinforced concrete erosion test cell selects the structure or of the first steel reinforced concrete erosion test cell
The structure of two kinds of steel reinforced concrete erosion test cells: wherein
In the structure of the first steel reinforced concrete erosion test cell, armored concrete composite construction, including
Concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length side
To, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；Set at the two ends of reinforcing bar
Putting sealant, one end of reinforcing bar is connected with wire；Arranging duct on concrete test block, described duct is uniform
Be arranged on one with on the reinforcing bar circumference as the center of circle being arranged on concrete test block middle position, and along concrete
Test block length direction, whole concrete test block is run through in duct；The two ends in duct are connected with seal for pipe joints respectively；
Pipeline opening straight up, and pipeline tapping is higher than concrete test block, is full of duct realizing liquid；
In the structure of the second steel reinforced concrete erosion test cell, armored concrete composite construction, including
Concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete test block length side
To, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；Set at the two ends of reinforcing bar
Putting sealant, one end of reinforcing bar is connected with wire；Arranging duct on concrete test block, described duct is uniform
Be arranged on one with on the reinforcing bar circumference as the center of circle being arranged on concrete test block middle position, and along concrete
Test block length direction, whole concrete test block is run through in duct；The two ends in duct are connected with seal for pipe joints respectively；
Pipeline is connected with reserving liquid tank, and arranges pump and effusion meter on pipeline, to realize liquid in reserving liquid tank by hole
The one end in road enters concrete test block, and the other end flows out and is back to reserving liquid tank, utilizes pump and effusion meter simultaneously
Cooperation, it is achieved control and the adjustment to liquid flow velocity in pipeline and duct；
Switch is set between two steel reinforced concrete erosion test cells, switch respectively with two armored concrete
Wire in corrosion test unit is connected.
In technique scheme, the quantity in duct is 4, lay respectively at the surface of reinforcing bar, underface,
Front-left and front-right, a diameter of 6mm, the distance of duct centre distance reinforcing steel bar center is 8mm；Concrete
The a length of 160mm of test block, width is 80mm, and height is 80mm.
In technique scheme, arranging screw and packing ring in one end of reinforcing bar, screw is screwed into steel through packing ring
Inside muscle, wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And
Wire passes sealant.
In technique scheme, sealant is polystyrene resin layer, and sealant covers and stretches out concrete examination
The two ends of the reinforcing bar of block, and the reinforcing bar extended in concrete test block in oversite concrete test block.At concrete
In test block, a length of 30mm of reinforcing bar that sealant covers.
The detection method of reinforcement in concrete macro cell corrosion, in a steel reinforced concrete erosion test cell
Reinforcing bar is anode reinforcing bar, and the reinforcing bar in another steel reinforced concrete erosion test cell is negative electrode reinforcing bar, according to
The following step is carried out:
Step 1, uses the water in flat vessel that two steel reinforced concrete erosion test cells are carried out moistening, with
Make between two steel reinforced concrete erosion test cells, to form the electricity general character；
In step 1, by all or part of for concrete test block in two steel reinforced concrete erosion test cells
It is immersed in the water, to simulate the macro cell corrosion of different humidity or underwater concrete, such as by two reinforced concretes
In soil corrosion test unit, concrete test block is immersed in the water 3-5mm.
Step 2, by pipeline injection experiments liquid in the duct of concrete test block；
In step 2, experimental liquid is Chloride Solution or corrosion inhibitor solution.
Step 3, uses determinator to be connected with steel reinforced concrete erosion test cell；
In described step 3, determinator is corrosion diagnosis instrument or steel bar corrosion instrument or electrochemical workstation
Or zero resistance galvanometer, in actual use, require to be attached according to the use of each determinator.
Step 4: disconnect the wire between negative electrode reinforcing bar and anode reinforcing bar, persistently measure the micro cell of negative electrode reinforcing bar
Corrosion potential Emi-cWith micro-cell corrosion electric current density imi-c, the micro-cell corrosion current potential E of anode reinforcing barmi-aWith
Micro-cell corrosion electric current density imi-a；
Step 5: connect the wire between negative electrode reinforcing bar and anode reinforcing bar, the macro cell of test constantly negative electrode reinforcing bar
Corrosion unit Ema-c, the macro cell corrosion current potential E of anode reinforcing barma-a, between negative electrode reinforcing bar and anode reinforcing bar flow
Dynamic macro cell corrosion electric current density ima=ima-c=ima-a；
Step 6: step 4 and step 5 are tried as a cycle period, repetition step 4 and step 5
Test.
In described step 4, anode reinforcing bar and cathode steel tendon breaking open state (i.e. micro-cell corrosion state)
Time is 24 weeks (i.e. one week is 7 days, and every day is 24 hours), in order to negative electrode reinforcing bar and anode reinforcing bar
Between the recovery of micro-cell corrosion state and stable.
In described step 5, anode reinforcing bar and the time of negative electrode reinforcing bar connection status (i.e. macro cell corrosion)
It is 24 weeks (i.e. one week is 7 days, and every day is 24 hours), in order to flow through negative electrode reinforcing bar and anode steel steel
Stablizing of macro cell corrosion electric current between muscle, and macro cell polarization stablize.
In described step 6, using step 4 and step 5 as a cycle period, an anode reinforcing bar and
Cathode steel tendon breaking open state and an anode reinforcing bar and negative electrode reinforcing bar connection status form a cycle period, time
Between be 48 weeks (i.e. one week is 7 days, and every day is 24 hours).
When detecting, corrosion potential, also commonly referred to as half-cell prtential, by corrosion diagnosis instrument or steel
Muscle corrosion instrument or electrochemical workstation record.Micro-cell corrosion electric current density imi, by Stern-Geary equation meter
Calculate and obtain, it may be assumed that imi=B/Rp, in formula: Rp is reinforcing bar impedance (k Ω .cm2), B is Stern-Geary constant.
Reinforcing bar impedance Rp is recorded by corrosion diagnosis instrument or steel bar corrosion instrument or electrochemical workstation.Macro cell corrosion electricity
Current density ima, following formula calculate and obtain: ima=Ima/Aa, in formula: ImaIt is macro cell corrosion electric current (μ A),
AaIt is corroded area (generally reinforcing bar radial cross-section street, the cm of anode reinforcing bar2).Anode reinforcing bar is defined
For discharging the reinforcing bar of electronics, judgement can be carried out from the flow direction of grand electric current and draw.Macro cell corrosion electric current Ima
Zero resistance galvanometer is used to record.
In the off state, the micro-cell corrosion current potential E of negative electrode reinforcing bar is measuredmi-cClose with micro-cell corrosion electric current
Degree imi-c, the micro-cell corrosion current potential E of anode reinforcing barmi-aWith micro-cell corrosion electric current density imi-a；Connecting shape
Under state, measure macro cell corrosion unit E of negative electrode reinforcing barma-c, the macro cell corrosion current potential E of anode reinforcing barma-a、
Macro cell corrosion electric current density i of flowing between negative electrode reinforcing bar and anode reinforcing barma=ima-c=ima-a。
In a cycle period or several cycle period, detection obtains above-mentioned electric current and electric potential signal is carried out point
Analysis test and appraisal, the location parameter be given is as follows:
Potential difference between negative electrode reinforcing bar and anode reinforcing bar under off-state (micro-cell corrosion state)
ΔEcorr1=/Emi-c-Emi-a/；
Potential difference between negative electrode reinforcing bar and anode reinforcing bar under connection status (macro cell corrosion state)
ΔEcorr4=/Ema-c-Ema-a/；
The polarization potential difference of negative electrode reinforcing bar is that it in (micro cell) state of disconnection and connects (macro cell) state
Under potential difference Δ Ecorr2=/Emi-c-Ema-c/；
The polarization potential difference of anode reinforcing bar is that it in (micro cell) state of disconnection and connects (macro cell) state
Under potential difference Δ Ecorr3=/Ema-a-Emi-a/, and Δ Ecorr1=Δ Ecorr2+ΔEcorr3+ΔEcorr4；
The macro cell corrosion polarization ratio PR of negative electrode reinforcing barsteel-c=Δ Ecorr2/ΔEcorr1；
The macro cell corrosion polarization ratio PR of anode reinforcing barsteel-a=Δ Ecorr3/ΔEcorr1；
The macro cell corrosion polarization ratio PR of concrete impedancecon=Δ Ecorr4/ΔEcorr1, and
PRsteel-c+PRsteel-a+PRcon=1；
The macro cell corrosion polarization slope β of negative electrode reinforcing barma-c=Δ Ecorr2/[log(imi-c)-log(ima-c)]；
The macro cell corrosion polarization slope β of anode reinforcing barma-a=Δ Ecorr3/[log(ima-a)-log(imi-a)]。
Mensuration based on above-mentioned parameter, the control model evaluating reinforcement in concrete macro cell corrosion is as follows:
(1) negative electrode reinforcing bar control model (i.e. PRsteel-c>=60%, PRsteel-a≤ 30%, PRcon< 10%)；
(2) anode reinforcing bar control model (i.e. PRsteel-c≤ 30%, PRsteel-a>=60%, PRcon< 10%)；
(3) mixing control model (i.e. 30% < PRsteel-c< 60%, 30% < PRsteel-a< 60%, PRcon< 40%)；
(4) concrete impedance control pattern (i.e. PRsteel-c≤ 30%, PRsteel-a≤ 30%, PRcon>=40%).
In the detection and assay of reinforcement in concrete macro cell corrosion, potential difference, is to determine macro cell
One of principal element of corrosion current size, by analyzing potential difference Δ Ecorr1、ΔEcorr2、ΔEcorr3 and Δ Ecorr4
With macro cell corrosion electric current density imaRelation, it is possible to preferably evaluate negative electrode reinforcing bar, anode reinforcing bar and coagulation
The soil impedance impact on macro cell corrosion electric current.Polarization ratio, is obtained by following manner, it may be assumed that with horizontal seat
It is designated as Δ Ecorr1, vertical coordinate is Δ EcorrI (i=2,3,4) draws scatterplot, and is fitted with linear function,
Then the slope of straight line is respectively defined as polarization ratio, the polarization ratio of anode reinforcing bar and the coagulation of negative electrode reinforcing bar
The polarization ratio of soil.Polarization ratio, it is possible to evaluate negative electrode reinforcing bar, anode reinforcing bar and concrete impedance to grand electricity
The Relative Contribution degree of pond corrosion；The control model of reinforcing bar macro cell corrosion under each corrosive environment can be illustrated；
Reflect that anode and negative electrode reinforcing bar polarize release electronics and the energy of the consumption electronics that polarizes under macro cell corrosion state
Power, it is possible to the power of corrosive power resisted under macro cell corrosion state by evaluation negative electrode reinforcing bar and anode reinforcing bar.
In being embodied as, reinforcing bar refer to regular reinforcement in xoncrete structure (such as HPB300, HRB335,
HRBF335, HRB400, HRBF400, HRB500, HRBF500).The intensity etc. of described concrete
Level is C20～C60.What the present embodiment was selected be HPB300 plain bar and strength grade is C30 concrete,
It is embodied as follows.
What the present embodiment was selected is HPB300 plain bar, diameter 20mm, long 180mm, reinforcing bar two ends
The position of portion's 40mm length all seals wrapped with polystyrene resin, and reinforcing bar is poured to be mixed in 80 × 80 × 160mm
Coagulate the center position of soil test block, and surrounding is uniform-distribution with the aperture of 4 diameter 6mm.Concreting
Time at the HPB300 plain bar of the preset 4 diameter 6mm of aperture position, take out before concrete coagulation hardens
Go out to form aperture, after concrete test block hardens, by the aperture of test block end and plastic suction pipe polyphenyl second
Olefine resin is tightly connected.
Strength grade of concrete used is C30, and its match ratio is cement: flyash: fluvial sand: rubble: additive: water
=1:0.43:3.11:3.8:0.014:0.6.Negative electrode concrete test block mixes 0%Cl-and (accounts for Binder Materials matter when pouring
Amount), anode concrete test block mixes 3%Cl-(accounting for Binder Materials quality) when pouring, so that negative electrode reinforcing bar
With it is poor to present significant corrosion potential between anode reinforcing bar, it is simple under macro cell corrosion state, it is possible to clear
Clear observes negative electrode reinforcing bar and the polarization behavior of anode reinforcing bar.
The all demouldings after pouring 1 day of negative electrode concrete test block and anode concrete test block, then proceed to be placed on 20 DEG C
Thermostatic chamber in carry out in water maintenance to age.Take out afterwards, by a negative electrode test block and an anode test block
Being positioned in the flat plastic ware containing a small amount of water, the water in vessel is just above the lower limb of test block
About 3-5mm.Then it is placed at room temperature 2 weeks, make the humidity of test block keep phase with indoor humidity
To stable.
The corrosion diagnosis device used in the present embodiment is the CM-SE1 type corrosion diagnosis of Ji Yan commercial firm of Nippon Steel exploitation
Device, the zero resistance electric current of use is calculated as the HM-103A type zero resistance galvanometer of Big Dipper electrician Co., Ltd..
First, the wire of negative electrode reinforcing bar test block and the wire of anode reinforcing bar test block are first off 2 weeks, this
Time negative electrode reinforcing bar and anode reinforcing bar be respectively at micro-cell corrosion state；CM-SE1 corrosion diagnosis device is used to divide
Ce Liang negative electrode reinforcing bar and negative electrode reinforcing bar corrosion potential E under micro cell statemi-cAnd Emi-a, erosion resistance
Rp-cAnd Rp-a, and electrical impedance R of mortar (i.e. concrete test block)con；The time interval measured is 1 day,
To obtain the time varied curve of each corrosion parameter；During measurement, full water absorbent cotton is positioned over corrosion diagnosis device
Between probe and concrete test block surface, to guarantee good current conductivity；Negative electrode reinforcing bar and negative electrode reinforcing bar
Corrosion electric current density in the off state is referred to as micro-cell corrosion electric current density imi-cAnd imi-a, can be by
Stern-Geary equation calculates and obtains, it may be assumed that imi=B/Rp, in formula, imiIt it is micro-cell corrosion electric current density
(μA/cm2), RpIt is reinforcing bar impedance (k Ω .cm2), B is Stern-Geary constant, when reinforcing bar is in corrosion
State be value be 26mV, when reinforcing bar is in passive state, value is 52mV.Test measurement data is shown in Table
1。
Then, the wire of negative electrode reinforcing bar test block and the wire of anode reinforcing bar test block again are at connection status 2 weeks, this
Time negative electrode reinforcing bar and anode reinforcing bar be respectively at macro cell corrosion state；CM-SE1 corrosion diagnosis device is used to divide
Ce Liang negative electrode reinforcing bar and negative electrode reinforcing bar corrosion potential E under macro cell statema-cAnd Ema-a；Use
HM-103A type zero resistance galvanometer records the electric current flowed through between negative electrode reinforcing bar and anode reinforcing bar, the grandest electric current；
Macro cell corrosion electric current density is calculated by following formula and obtains, it may be assumed that ima=ima-c=ima-a=Ima/Aa, in formula, imaIt is grand
Battery corrosion electric current density (μ A/cm2), ImaIt is macro cell corrosion electric current (μ A), AaIt it is the corruption of anode reinforcing bar
Erosion area (cm2)；Anode reinforcing bar is defined as discharging the reinforcing bar of electronics, can enter from the flow direction of grand electric current
Row judgement draws；The time interval measured is 1 day, in order to obtain the time varied curve of each corrosion parameter.
Off-state 2 weeks and connection status 2 weeks, this is defined as 1 test cycle for 4 weeks, and the present embodiment exists
After carrying out 6 test cycles, in the aperture of anode test block, inject the nitrite ion solution of 8mol/L
(NaNO2), then proceed by test cycle to 20 times.Test measurement data is shown in Table 1.
Calculate the potential difference between negative electrode reinforcing bar and anode reinforcing bar under (micro cell) state of disconnection
ΔEcorr1=/Emi-c-Emi-a/, connect the potential difference between negative electrode reinforcing bar and anode reinforcing bar under (macro cell) state
ΔEcorr4=/Ema-c-Ema-a/, the polarization potential difference of negative electrode reinforcing bar is that it is in (micro cell) state of disconnection and connection
Potential difference Δ E under (macro cell) statecorr2=/Emi-c-Ema-c/, the polarization potential difference of anode reinforcing bar be it
(micro cell) state of disconnection and the potential difference Δ E connected under (macro cell) statecorr3=/Ema-a-Emi-a/, cloudy
The macro cell corrosion polarization ratio PR of pole reinforcing barsteel-c=Δ Ecorr2/ΔEcorr1, the macro cell corrosion pole of anode reinforcing bar
Change ratio PRsteel-a=Δ Ecorr3/ΔEcorr1, the macro cell corrosion polarization ratio of concrete impedance
PRcon=Δ Ecorr4/ΔEcorr1, the macro cell corrosion polarization slope β of negative electrode reinforcing barma-c=Δ Ecorr2/
[log(imi-c)-log(ima-c)], the macro cell corrosion polarization slope β of anode reinforcing barma-a=Δ Ecorr3/
[log(ima-a)-log(imi-a)].Result of calculation is shown in Table 1.
Analyze potential difference Δ Ecorr1、ΔEcorr2、ΔEcorr3 and Δ Ecorr4 with macro cell corrosion electric current density ima's
Relation, evaluates negative electrode reinforcing bar, anode reinforcing bar and concrete (mortar) impedance shadow to macro cell corrosion electric current
Ring.As shown in Table 1, when after the nitrite ion solution injecting 8mol/L in the aperture of anode test block, along with
Macro cell potential difference is gradually reduced, and macro cell corrosion electric current density also decreases, and nitrite ion is to reinforcing bar
The inhibition of macro cell corrosion is confirmed.
Analyze polarization ratio, evaluate negative electrode reinforcing bar, anode reinforcing bar and concrete (mortar) impedance rotten to macro cell
The Relative Contribution degree of erosion, illustrates the control model of reinforcing bar macro cell corrosion under this corrosive environment.Can by table 1
Knowing, in the present embodiment, the polarization ratio of negative electrode reinforcing bar is relatively big, plays main contributions in macro cell corrosion, therefore this
In embodiment, the macro cell corrosion control model of reinforcing bar is that negative electrode reinforcing bar controls.
Analyze polarization slope, evaluate anode reinforcing bar and negative electrode reinforcing bar polarizes under macro cell corrosion state and discharges electronics
With the ability that polarization consumes electronics, evaluate negative electrode reinforcing bar and corruption resisted under macro cell corrosion state by anode reinforcing bar
The power of erosion ability.As shown in Table 1, molten when the nitrite ion injecting 8mol/L in the aperture of anode test block
After liquid, the polarization slope of anode reinforcing bar gradually counterclockwise increases, to the rejection ability of macro cell corrosion by
Cumulative by force, the inhibition of reinforcing bar macro cell corrosion is confirmed by nitrite ion.
Table 1 embodiment data and interpretation of result
Note: the present embodiment, after carrying out 6 test cycles, injects the nitrite ion solution (NaNO of 8mol/L in the aperture of anode test block2), so
After proceed test cycle to 20 times.Data Emi-c that are given in table, Emi-a, Rp-c, Rp-a, Rcon, Ema-c, Ema-a, ima,
Ima-c, ima-a, be the meansigma methods of each stage surveyed data.
The above, only embodiments of the invention, it is not intended to limit protection scope of the present invention.
In addition to the implementation, the present invention can also have other embodiments.All employing equivalents or equivalence become
Change the technical scheme of formation, all fall within the protection domain of application claims.
Claims (10)
1. the detection device of reinforcement in concrete macro cell corrosion, it is characterised in that: include two steel
Reinforced concrete corrosion test unit, container, two of which steel reinforced concrete erosion test cell
It is arranged in same container, and water is set in container；Two armored concrete corruption
Erosion test cell structure is identical, and each steel reinforced concrete erosion test cell, including reinforced concrete
Soil composite construction, pipeline and wire, two steel reinforced concrete erosion test cells select the first steel
The structure of reinforced concrete corrosion test unit or the knot of the second steel reinforced concrete erosion test cell
Structure: wherein
In the structure of the first steel reinforced concrete erosion test cell, armored concrete composite construction,
Including concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete
Test block length direction, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；
Arranging sealant at the two ends of reinforcing bar, one end of reinforcing bar is connected with wire；Concrete test block sets
Putting duct, described duct is uniformly arranged on one with the reinforcing bar being arranged on concrete test block middle position
For on the circumference in the center of circle, and along concrete test block length direction, whole concrete test block is run through in duct；
The two ends in duct are connected with seal for pipe joints respectively；Pipeline opening straight up, and pipeline tapping is higher than
Concrete test block, is full of duct realizing liquid；
In the structure of the second steel reinforced concrete erosion test cell, armored concrete composite construction,
Including concrete test block and reinforcing bar, steel-bar arrangement is in the middle position of concrete test block；Along concrete
Test block length direction, reinforcing bar runs through whole concrete test block, and concrete test block is stretched out at reinforcing bar two ends；
Arranging sealant at the two ends of reinforcing bar, one end of reinforcing bar is connected with wire；Concrete test block sets
Putting duct, described duct is uniformly arranged on one with the reinforcing bar being arranged on concrete test block middle position
For on the circumference in the center of circle, and along concrete test block length direction, whole concrete test block is run through in duct；
The two ends in duct are connected with seal for pipe joints respectively；Pipeline is connected with reserving liquid tank, and arranges on pipeline
Pump and effusion meter, to realize by the one end in duct, liquid in reserving liquid tank is entered concrete test block, separately
One end is flowed out and is back to reserving liquid tank, utilizes the cooperation of pump and effusion meter, it is achieved exist liquid simultaneously
The control of flow velocity and adjustment in pipeline and duct；
Switch is set between two steel reinforced concrete erosion test cells, switch respectively with two reinforcing bars
Wire in concrete erosion test cell is connected.
2. the detection device of reinforcement in concrete macro cell corrosion as claimed in claim 1, it is special
Levying and be: the quantity in described duct is 26, a diameter of 6-20mm in duct, in duct
The distance of heart distance reinforcing steel bar center is 6-20mm.
3. the detection device of reinforcement in concrete macro cell corrosion as claimed in claim 1, it is special
Levying and be: a length of 160-200mm of described concrete test block, width is 60-100mm, highly
For 60-100mm.
4. the detection device of reinforcement in concrete macro cell corrosion as claimed in claim 1, it is special
Levying and be: arrange screw and packing ring in one end of reinforcing bar, screw is screwed into inside reinforcing bar through packing ring,
Wire is connected with screw or packing ring, to realize the UNICOM of wire and the measurement circuit of reinforcing bar；And lead
Line passes sealant.
5. the detection device of reinforcement in concrete macro cell corrosion as claimed in claim 1, it is special
Levying and be: described sealant is polystyrene resin layer, sealant covers and stretches out concrete test block
The two ends of reinforcing bar, and the reinforcing bar extended in concrete test block in oversite concrete test block, mixed
In the test block of solidifying soil, a length of 30-50mm of reinforcing bar that sealant covers.
6. the detection method of reinforcement in concrete macro cell corrosion, it is characterised in that: a reinforcing bar mixes
Reinforcing bar in solidifying soil corrosion test unit is anode reinforcing bar, and the test of another steel reinforced concrete erosion is single
Reinforcing bar in unit is negative electrode reinforcing bar, carries out according to the following step:
Step 1, uses the water in flat vessel to moisten two steel reinforced concrete erosion test cells
Wet, so that forming the electricity general character between two steel reinforced concrete erosion test cells；
Step 2, by pipeline injection experiments liquid in the duct of concrete test block；
Step 3, uses determinator to be connected with steel reinforced concrete erosion test cell；
Step 4: disconnect the wire between negative electrode reinforcing bar and anode reinforcing bar, persistently measure negative electrode reinforcing bar
Micro-cell corrosion current potential Emi-cWith micro-cell corrosion electric current density imi-c, the micro cell of anode reinforcing bar is rotten
Erosion current potential Emi-aWith micro-cell corrosion electric current density imi-a；
Step 5: connect the wire between negative electrode reinforcing bar and anode reinforcing bar, test constantly negative electrode reinforcing bar
Macro cell corrosion unit Ema-c, the macro cell corrosion current potential E of anode reinforcing barma-a, negative electrode reinforcing bar and sun
Macro cell corrosion electric current density i of flowing between the reinforcing bar of polema=ima-c=ima-a；
Step 6: using step 4 and step 5 as a cycle period, repeats step 4 and step 5
Test.
7. the detection method of reinforcement in concrete macro cell corrosion as claimed in claim 6, it is special
Levy and be: in described step 1, concrete in two steel reinforced concrete erosion test cells is tried
Block is immersed in the water in whole or in part, to simulate the macro cell corrosion of different humidity or underwater concrete,
Such as concrete test block in two steel reinforced concrete erosion test cells is immersed in the water 3-5mm；Institute
In the step 2 stated, experimental liquid is Chloride Solution or corrosion inhibitor solution.
8. the detection method of reinforcement in concrete macro cell corrosion as claimed in claim 6, it is special
Levying and be: in described step 3, determinator is corrosion diagnosis instrument or steel bar corrosion instrument or electricity
Chem workstation or zero resistance galvanometer.
9. the detection method of reinforcement in concrete macro cell corrosion as claimed in claim 6, it is special
Levying and be: in described step 4, (i.e. micro cell is rotten for anode reinforcing bar and cathode steel tendon breaking open state
Erosion state) time be 24 weeks, in order to micro-cell corrosion between negative electrode reinforcing bar and anode reinforcing bar
The recovery of state and stable；In described step 5, anode reinforcing bar and negative electrode reinforcing bar connection status are (i.e.
Macro cell corrosion) time be 24 weeks, in order to flow through between negative electrode reinforcing bar and anode steel reinforcing bar
The stablizing of macro cell corrosion electric current, and the stablizing of macro cell polarization；In described step 6, will
Step 4 and step 5 are as a cycle period, an anode reinforcing bar and cathode steel tendon breaking open state
Forming a cycle period with an anode reinforcing bar and negative electrode reinforcing bar connection status, the time is 48 weeks.
10. the detection method of reinforcement in concrete macro cell corrosion as claimed in claim 6, it is special
Levy and be: in the off state, measure the micro-cell corrosion current potential E of negative electrode reinforcing barmi-cAnd micro cell
Corrosion electric current density imi-c, the micro-cell corrosion current potential E of anode reinforcing barmi-aWith micro-cell corrosion electric current
Density imi-a；In connected state, macro cell corrosion unit E of negative electrode reinforcing bar is measuredma-c, anode steel
The macro cell corrosion current potential E of musclema-a, between negative electrode reinforcing bar and anode reinforcing bar flowing macro cell corrosion
Electric current density ima=ima-c=ima-a；
In a cycle period or several cycle period, detection obtains above-mentioned electric current and electric potential signal
Being analyzed test and appraisal, the location parameter be given is as follows:
Potential difference between negative electrode reinforcing bar and anode reinforcing bar under off-state (micro-cell corrosion state)
ΔEcorr1=/Emi-c-Emi-a/；
Potential difference between negative electrode reinforcing bar and anode reinforcing bar under connection status (macro cell corrosion state)
ΔEcorr4=/Ema-c-Ema-a/；
The polarization potential difference of negative electrode reinforcing bar is that it in (micro cell) state of disconnection and connects (macro cell)
Potential difference Δ E under statecorr2=/Emi-c-Ema-c/；
The polarization potential difference of anode reinforcing bar is that it in (micro cell) state of disconnection and connects (macro cell)
Potential difference Δ E under statecorr3=/Ema-a-Emi-a/, and Δ Ecorr1=Δ Ecorr2+ΔEcorr3+ΔEcorr4；
The macro cell corrosion polarization ratio PR of negative electrode reinforcing barsteel-c=Δ Ecorr2/ΔEcorr1；
The macro cell corrosion polarization ratio PR of anode reinforcing barsteel-a=Δ Ecorr3/ΔEcorr1；
The macro cell corrosion polarization ratio PR of concrete impedancecon=Δ Ecorr4/ΔEcorr1, and
PRsteel-c+PRsteel-a+PRcon=1；
The macro cell corrosion polarization slope β of negative electrode reinforcing barma-c=Δ Ecorr2/[log(imi-c)-log(ima-c)]；
The macro cell corrosion polarization slope β of anode reinforcing barma-a=Δ Ecorr3/[log(ima-a)-log(imi-a)]；
Mensuration based on above-mentioned parameter, evaluates the control model of reinforcement in concrete macro cell corrosion
As follows:
(1) negative electrode reinforcing bar control model (i.e. PRsteel-c>=60%, PRsteel-a≤ 30%, PRcon< 10%)；
(2) anode reinforcing bar control model (i.e. PRsteel-c≤ 30%, PRsteel-a>=60%, PRcon< 10%)；
(3) mixing control model (i.e. 30% < PRsteel-c< 60%, 30% < PRsteel-a< 60%,
PRcon< 40%)；
(4) concrete impedance control pattern (i.e. PRsteel-c≤ 30%, PRsteel-a≤ 30%,
PRcon>=40%).
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| CN110823983A (en) * | 2019-10-08 | 2020-02-21 | 九州职业技术学院 | Real-time monitoring device and detection method for reinforced bar galvanic couples in concrete |
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| CN110186964B (en) * | 2019-04-26 | 2021-05-07 | 浙江大学 | Device and method for testing corrosion macro current of steel bar in concrete |
| CN113252545B (en) * | 2020-05-28 | 2022-07-19 | 中交天津港湾工程研究院有限公司 | Method for rapidly identifying corrosion control mode of steel bar macro cell in marine concrete |
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