CN104897561A - Method for fast simulation testing corrosion property of reinforcing steel bar in concrete - Google Patents
Method for fast simulation testing corrosion property of reinforcing steel bar in concrete Download PDFInfo
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- CN104897561A CN104897561A CN201510357909.7A CN201510357909A CN104897561A CN 104897561 A CN104897561 A CN 104897561A CN 201510357909 A CN201510357909 A CN 201510357909A CN 104897561 A CN104897561 A CN 104897561A
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Abstract
The invention discloses a method for fast simulation testing the corrosion property of a reinforcing steel bar in concrete. The method includes: taking the to-be-tested reinforcing steel bar, wrapping the lateral column face of the reinforcing steel bar with epoxy resin, and preparing corrosion liquid containing corrosion ions; cleaning and polishing the upper and lower end faces of the to-be-tested reinforcing steel bar, placing the lower surface of the to-be-tested reinforcing steel bar into the corrosion liquid, placing the corrosion liquid in a constant-temperature environment, placing a copper electrode and a reference electrode into the corrosion liquid, and using an electrochemical workstation to record the change process of potential along with time. The method has the advantages that preprocessed reinforcing steel bar is directly placed into the corrosion liquid to simulate the corrosion property of the reinforcing steel bar in the concrete, testing time can be shortened greatly, and the obtained testing result is high in accuracy.
Description
Technical field
The invention belongs to material corrosion resistance field tests, relate to the method for test reinforcing bar decay resistance, particularly a kind of method of Fast simulation test reinforcement in concrete corrosive nature.
Background technology
It is one of concrete works field problem of greatest concern that reinforcement corrosion causes concrete structure durability to reduce always, and many scientific research personnel are to this has been lot of experiments.
Research shows, the reason of reinforcement in concrete generation corrosion failure is that rebar surface zones of different defines potential difference (PD), namely anode and negative electrode is formed at rebar surface different potentials section, and the rebar surface at anode position is in active state, freely can discharge electronics, the precondition that reinforcing bar anode is in active state is the destruction of rebar passivation film, namely usually said " depassivation ".It is the main cause causing rebar surface depassivation that concrete carbonization and corrosive ions (mainly chlorion) corrode.
The erosion of corrosive ions has two kinds of main paties, and one is the salt be dissolved with in mixing concrete water containing corrosive ions, and these ions just stop wherein after mixing concrete is built, and slowly move to rebar surface; Another kind of approach is that the salt containing these ions is attached to concrete surface, to penetrate into concrete and move to rebar surface to cause corrosion reaction from the external world.Current, Chinese scholars generally uses concrete cladding reinforcing steel bar, is then placed in the salt solusion containing corrosive ions and the corrosion potential of the method for Timing measurement reinforcing bar current potential measurement reinforcing bar.
But because the rate of diffusion of chlorion in concrete is very slow, modern concrete is more and more closely knit again, cause the time of this method of testing often need periods of months even several years.In addition, because reinforcing bar is coated in solid concrete completely, measured experimental result is often unstable, is difficult to the essential change process accurately reflecting reinforcing bar current potential.
Summary of the invention
Because above-mentioned domestic and international present Research and background, it is shorter that the object of the invention is to provide a kind of test period, the method for test result simulation test reinforcement in concrete corrosive nature more accurately.
The method of Fast simulation test reinforcement in concrete corrosive nature provided by the invention, comprises the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), the corrosive salt solution of preparation containing corrosive ions;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive liquid;
4), corrosive salt solution is placed in the diverse location of proving installation, under making it be placed in isoperibol, puts into copper electrode and reinforcing bar to be measured to corrosive salt solution;
5) electrochemical workstation record reinforcement corrosion current potential process over time, is utilized.
Also comprise after terminating test and observe solution colour change and measure the steps such as reinforcing bar lower surface corroded area size, utilize special purpose device to test reinforcement in concrete corrosion regularity.This Special testing device comprises and is bolted fixing aluminium alloy plate up and down, between described upper and lower aluminium alloy plate, lower aluminium alloy plate is provided with multiple reagent bottle with array way, described upper aluminium alloy plate and each reagent bottle correspondence position are respectively equipped with copper electrode jack, reference electrode reference electrode plug and reinforcing bar jack.
Further, described reagent bottle volume is 80-120ml, and the test duration is 280-350min, and the reinforcing bar lower surface corrosive liquid degree of depth of submerging is 10mm.
Beneficial effect of the present invention is: the present invention is directly placed in corrosive salt solution and studies with the corrosive nature of simulated concrete pore solution to reinforcing bar after carrying out pre-service to reinforcing bar; significantly can shorten the test duration; and avoiding the impact of unevenness on test process of coated concrete layer and concrete cover and inner structure, gained test result is more accurate.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the structural representation of the method equipment therefor of Fast simulation of the present invention test reinforcement in concrete corrosive nature;
Fig. 2 is the actual figure of proving installation when experimental test;
Fig. 3 is each reagent bottle numbering figure in proving installation;
Fig. 4 is the electrochemical workstation measuring reinforcement corrosion current potential;
Fig. 5 is reinforcement corrosion current potential change curve in time in variable concentrations NaCl solution in embodiment 1;
Fig. 6 is reinforcement corrosion current potential change curve in time in the concrete test block adopting conventional method gained variable concentrations NaCl solution to prepare;
Fig. 7 is the whole current potential of variable concentrations NaCl solution reinforcement corrosion and the contrast of the whole current potential of corrosion that records with conventional concrete cladding process thereof in embodiment 1;
Fig. 8 is variable concentrations NH in embodiment 2
4reinforcement corrosion current potential change curve in time in Cl solution;
Fig. 9 is the NH of variable concentrations
4reinforcement corrosion current potential curve over time in the concrete test block of Cl solution preparation;
Figure 10 is variable concentrations Na in embodiment 3
2sO
4reinforcement corrosion current potential change curve in time in solution;
Figure 11 is the Na of variable concentrations
2sO
4reinforcement corrosion current potential curve over time in the concrete test block of solution preparation;
Figure 12 be in embodiment 3 reinforcing bar at variable concentrations Na
2sO
4corrosion area in solution;
Figure 13 is the corrosion area of reinforcing bar in variable concentrations NaCl solution in embodiment 1;
Figure 14 is variable concentrations (NH in embodiment 4
4)
2sO
4reinforcement corrosion current potential change curve in time in solution;
Figure 15 is the (NH of variable concentrations
4)
2sO
4reinforcement corrosion current potential curve over time in the concrete test block of solution preparation.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment 1:
The present embodiment is that in Fast simulation test concrete, corrosive ions, to the method for reinforcement corrosion performance, will carry out in accordance with the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), prepare the corrosive liquid containing corrosive ions, in the present embodiment, corrosive salt solution is NaCl solution;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive salt solution;
4), the NaCl solution of 7 kinds of variable concentrations of preparation is placed in isoperibol under, cover top panel and copper electrode and reinforcing bar to be measured be inserted and secured in the corresponding jack of top panel, making its lower surface all immerse about 10mm under corrosive salt liquid level of solution;
5) the potential value process over time when, utilizing electrochemical workstation record reinforcing bar generation corrosion electrochemistry to react;
6), terminate test, draw reinforcing bar corrosion potential value curve observe solution colour change and the corroded area size of reinforcing bar lower surface over time in variable concentrations NaCl solution.
The actual figure of proving installation when experimental test as shown in Figure 2, measures the electrochemical workstation of reinforcement corrosion current potential as shown in Figure 4.
In the present embodiment: utilize the corrosion regularity of special purpose device test reinforcing bar in variable concentrations NaCl solution as shown in Figure 1, this Special testing device comprises and is bolted fixing aluminium alloy plate up and down, between described upper and lower aluminium alloy plate, lower aluminium alloy plate is provided with multiple reagent bottle with array way, described upper aluminium alloy plate and each reagent bottle correspondence position are respectively equipped with copper electrode jack, reference electrode reference electrode plug and reinforcing bar jack;
In the present embodiment: special purpose device is provided with 15 corrosive liquid reagent bottles, every 7 is one group, each group be equipped with respectively variable concentrations containing the salt solusion of single corrosive ions, the surplus bottled distilled water of next reagent is as blank;
During use, the sodium chloride solution (comprising the distilled water control group of numbering 15) of the variable concentrations injecting 100ml in the reagent bottle of 1-7 is respectively numbered to device as shown in Figure 3, then cover top panel and insert reinforcing bar to be measured and copper electrode, make its upper surface connect respectively electrochemical workstation working electrode (W) and to electrode (C), reinforcement corrosion potential value result of variations in time under record variable concentrations NaCl solution, as shown in Figure 5.
As seen from Figure 5, along with the carrying out of test, the corrosion potential value of reinforcing bar increase all in time in the NaCl solution of 7 kinds of variable concentrations and reduce (rising of negative electricity place value) gradually, but the range of decrease reduces gradually, and tended to be steady between about 300-350 minute, reach a stationary value.
As seen from Figure 5, along with the rising of NaCl solution concentration, the stable corrosion potential E of reinforcing bar
stalso reduce gradually.
Fig. 6 is the reinforcement corrosion potential value curve over time recorded in the concrete test block adopting commonsense method namely to prepare by the NaCl solution of above-mentioned variable concentrations, as can be seen from Fig. 6 also, with the increase along with the time in concentration NaCl solution, the corrosion potential of reinforcing bar also decreases, but the range of decrease reduces gradually, and finally tend towards stability; Between variable concentrations NaCl solution, with the increase of its concentration, corrosion potential also decreases.
Comparison diagram 5,6 can be found out, variation tendency is identical in time for the potential value in Fig. 5 and Fig. 6 during the reaction of reinforcing bar generation corrosion electrochemistry, meanwhile, as can be seen from Figure 7, adopts the final stationary value E of reinforcement corrosion current potential measured by the inventive method
stthe variation tendency of the final stationary value of reinforcement corrosion current potential that records with traditional concrete cladding process of variation tendency also substantially identical.As can be seen here, adopt reinforcement corrosion performance and reinforcement in concrete corrosion condition measured by the inventive method to have the higher goodness of fit, the corrosive nature of reinforcement in concrete can be reflected completely.But the test duration of proving installation of the present invention is starkly lower than the test duration of traditional concrete cladding process, thus has test period short, the simple advantage of method of testing; As can be seen from Fig. 5,6, the experimental result of 7 comparative analysis the inventive method and traditional concrete cladding process, the inventive method is sensitiveer and easy than conventional concrete cladding process in the impact of research variable concentrations NaCl solution on reinforcement corrosion ability and corrosion rate.Thus, the inventive method is not only faster, and more accurate, and application value is obvious.
Embodiment 2
The present embodiment is that in Fast simulation test concrete, corrosive ions, to the method for reinforcement corrosion performance, will carry out in accordance with the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), prepare the corrosive salt solution containing corrosive ions, in the present embodiment, corrosive salt solution is NH
4cl solution;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive salt solution;
4), by the NH of 7 kinds of variable concentrations of preparation
4under Cl solution is placed in isoperibol, covers top panel and copper electrode and reinforcing bar to be measured be inserted and secured in the corresponding jack of top panel, making its lower surface all immerse about 10mm under corrosive salt liquid level of solution;
5) the potential value process over time when, utilizing electrochemical workstation record reinforcing bar generation corrosion electrochemistry to react;
6), terminate test, draw reinforcing bar at variable concentrations NH
4corrosion potential value curve observe solution colour change and the corroded area size of reinforcing bar lower surface over time in Cl solution.
In the present embodiment: utilize special purpose device as shown in Figure 1 to test reinforcing bar at variable concentrations NH equally
4corrosion regularity in Cl solution.
In the present embodiment: special purpose device is provided with 15 corrosive salt solution reagent bottles, and 7 is one group, is respectively charged into the salt solusion of the single corrosive ions of variable concentrations, the surplus bottled distilled water of next reagent is as blank.
During use, be numbered the NH of the variable concentrations injecting 100ml in the reagent bottle of 8-14 respectively to device as shown in Figure 3
4cl solution (distilled water of numbering 15 compares group), then cover top panel and insert reinforcing bar to be measured and copper electrode, make its upper surface connect respectively electrochemical workstation working electrode (W) and to electrode (C), record variable concentrations NH
4reinforcement corrosion potential value result of variations in time under Cl solution, as shown in Figure 8.
As seen from Figure 8, along with the carrying out of test, the NH of 7 kinds of variable concentrations
4the corrosion potential value of reinforcing bar increase all in time in Cl solution and reduce (rising of negative electricity place value) gradually, but the range of decrease reduces gradually, and tended to be steady between about 300-350 minute, reach a stationary value.But contrast with reinforcement corrosion current potential in the NaCl solution of same concentration and find, at synchronization NH
4in Cl solution, the corrosion potential value outline of reinforcing bar is lower than in NaCl solution, and this is due to NH
4 +the hydrolytic action of ion makes H in solution
+become many thus make salt solusion acidifying, pH value reduction causes caused by rebar surface passivating film acceleration rupture.
In addition as can be seen from Fig. 8 also, along with NH
4the rising of Cl solution concentration, the stable corrosion potential value E of reinforcing bar
stalso reduce gradually.
Fig. 9 adopts commonsense method namely with the NH of above-mentioned variable concentrations
4the reinforcement corrosion potential value curve over time recorded in the concrete test block of Cl solution preparation, with concentration NH as can be seen from Fig. 9 also
4along with the increase of time in Cl solution, the corrosion potential of reinforcing bar also decreases, but the range of decrease reduces gradually, and also finally tends towards stability; Variable concentrations NH
4between Cl solution, with the increase of its concentration, corrosion potential also decreases.
Comparison diagram 8,9 can be found out, variation tendency is identical in time for the potential value in Fig. 8 and Fig. 9 during the reaction of reinforcing bar generation corrosion electrochemistry, as can be seen here, adopts reinforcing bar measured by the inventive method at variable concentrations NH
4corrosion regularity in Cl solution and variable concentrations NH
4the reinforcement in concrete corrosion regularity of Cl solution preparation has the higher goodness of fit, also substantially can reflect that in concrete, corrosive ions is to the corrosive nature of reinforcing bar completely.And utilize the test duration of the whole potential value of reinforcing bar measured by proving installation of the present invention to be starkly lower than the test duration of traditional concrete cladding process, thus there is test period short, the simple advantage of method of testing; As can be seen from the experimental result of Fig. 8,9 comparative analysis the inventive method and traditional concrete cladding process, the inventive method is at research variable concentrations NH
4cl solution in the impact of reinforcement corrosion rule and corrosion rate also than conventional concrete cladding process more quick and precisely.
Embodiment 3
The present embodiment is that in Fast simulation test concrete, corrosive ions, to the method for reinforcement corrosion performance, will carry out in accordance with the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), prepare the corrosive salt solution containing corrosive ions, in the present embodiment, corrosive salt solution is Na
2sO
4solution;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive salt solution;
4), by the Na of 7 kinds of variable concentrations of preparation
2sO
4under solution is placed in isoperibol, covers top panel and copper electrode and reinforcing bar to be measured be inserted and secured in the corresponding jack of top panel, making its lower surface all immerse about 10mm under corrosive salt liquid level of solution;
5) the potential value process over time when, utilizing electrochemical workstation record reinforcing bar generation corrosion electrochemistry to react;
6), terminate test, draw reinforcing bar at variable concentrations Na
2sO
4corrosion potential value curve observe solution colour change and the corroded area size of reinforcing bar lower surface over time in solution.
In the present embodiment: utilize special purpose device as shown in Figure 1 to test reinforcing bar at variable concentrations Na equally
2sO
4corrosion regularity in solution.
In the present embodiment: Special testing device is provided with 15 corrosive salt solution reagent bottles, and 7 is one group, is respectively charged into the salt solusion of the single corrosive ions of variable concentrations, the surplus bottled distilled water of next reagent is as blank.
During use, first all reagent bottles in proving installation taken out and clean up with distilled water, being used further to this group testing experiment.After cleaning, reagent bottle is placed on proving installation lower panel correspondence position, is then numbered the Na of the variable concentrations injecting 100ml in the reagent bottle of 1-7 respectively to device as shown in Figure 3
2sO
4solution (distilled water of numbering 15 compares group), then cover top panel and insert reinforcing bar to be measured and copper electrode, make its upper surface connect respectively electrochemical workstation working electrode (W) and to electrode (C), record variable concentrations Na
2sO
4reinforcement corrosion potential value result of variations in time in solution, as shown in Figure 10.
As seen from Figure 10, along with the carrying out of test, the Na of 7 kinds of variable concentrations
2sO
4the corrosion potential value of reinforcing bar increase all in time in solution and reduce (rising of negative electricity place value) gradually, but the range of decrease reduces gradually, and tended to be steady between about 300-350 minute, reach a stationary value.But with the Na of same concentration
2sO
4in solution, the contrast of reinforcement corrosion current potential finds, at synchronization NH
4in Cl solution, the corrosion potential value outline of reinforcing bar is lower than at Na
2sO
4in solution, this is due to NH
4 +the hydrolytic action of ion makes H in solution
+become many thus make salt solusion acidifying, pH value reduction causes caused by rebar surface passivating film acceleration rupture.
In addition as can be seen from Figure 10 also, along with Na
2sO
4the rising of solution concentration, the stable corrosion potential value E of reinforcing bar
stalso reduce gradually.
Figure 11 adopts commonsense method namely with the Na of above-mentioned variable concentrations
2sO
4the reinforcement corrosion potential value curve over time recorded in the concrete test block of solution preparation, with concentration Na as can be seen from Figure 11 also
2sO
4along with the increase of time in solution, the corrosion potential of reinforcing bar also decreases, and the range of decrease reduces gradually, and also finally tends towards stability; Variable concentrations Na
2sO
4between solution, with the increase of its concentration, corrosion potential also decreases.
Contrast Figure 10,11 can find out, variation tendency is identical in time for the potential value in Figure 10 and Figure 11 during the reaction of reinforcing bar generation corrosion electrochemistry, as can be seen here, adopts reinforcing bar measured by the inventive method at variable concentrations Na
2sO
4corrosion regularity in solution and variable concentrations Na
2sO
4the reinforcement in concrete corrosion regularity of solution preparation has the higher goodness of fit, can reflect that in concrete, corrosive ions is to the corrosive nature of reinforcing bar and corrosion regularity equally completely, and utilize the test duration of the whole potential value of reinforcing bar measured by proving installation of the present invention to be starkly lower than the test duration of traditional concrete cladding process, thus there is test period short, the simple advantage of method of testing; As can be seen from the experimental result of Figure 10,11 comparative analysis the inventive method and traditional concrete cladding process, the inventive method is at research variable concentrations Na
2sO
4solution in the impact of reinforcement corrosion rule and corrosion rate also than conventional concrete cladding process more quick and precisely.And relatively with the Na of concentration
2sO
4in solution and NaCl solution, reinforcing bar finds Na in the corrosion potential value of synchronization
2sO
4in solution, potential value is lower; And reinforcing bar can be obtained in Figure 12 and Figure 13 after being completed with this proving installation respectively at variable concentrations Na
2sO
4the corrosion area of lower surface in solution and NaCl solution.The Na of same concentration can be found out
2sO
4in solution, reinforcing bar end face corrosion area is larger than in NaCl solution, and this can reflect SO
4 2-corrosive power be larger than Cl
-.
Embodiment 4
The present embodiment is that in Fast simulation test concrete, corrosive ions, to the method for reinforcement corrosion performance, will carry out in accordance with the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), prepare the corrosive salt solution containing corrosive ions, in the present embodiment, corrosive salt solution is (NH
4)
2sO
4solution;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive salt solution;
4), by (the NH of 7 kinds of variable concentrations of preparation
4)
2sO
4under solution is placed in isoperibol, covers top panel and copper electrode and reinforcing bar to be measured be inserted and secured in the corresponding jack of top panel, making its lower surface all immerse about 10mm under corrosive salt liquid level of solution;
5) the potential value process over time when, utilizing electrochemical workstation record reinforcing bar generation corrosion electrochemistry to react;
6), terminate test, draw reinforcing bar at variable concentrations (NH
4)
2sO
4corrosion potential value curve observe solution colour change and the corroded area size of reinforcing bar lower surface over time in solution.
In the present embodiment: utilize special purpose device as shown in Figure 1 to test reinforcing bar at variable concentrations (NH equally
4)
2sO
4corrosion regularity in solution.
In the present embodiment: special purpose device is provided with 15 corrosive salt solution reagent bottles, and 7 is one group, is respectively charged into the salt solusion of the single corrosive ions of variable concentrations, the surplus bottled distilled water of next reagent is as blank.
During use, be numbered (the NH of the variable concentrations injecting 100ml in the reagent bottle of 8-14 respectively to device as shown in Figure 3
4)
2sO
4solution (distilled water of numbering 15 compares group), then cover top panel and insert reinforcing bar to be measured and copper electrode, make its upper surface connect respectively electrochemical workstation working electrode (W) and to electrode (C), record variable concentrations (NH
4)
2sO
4reinforcement corrosion potential value result of variations in time under solution, as shown in figure 14.
As seen from Figure 14, along with the carrying out of test, (the NH of 7 kinds of variable concentrations
4)
2sO
4in solution, the increase all in time of the corrosion potential value of reinforcing bar first reduces rear rising, and tends to be steady between about 300-350 minute, reaches a stationary value.
In addition as can be seen from Figure 14 also, along with (NH
4)
2sO
4the rising of solution concentration, the whole potential value E of corrosion of reinforcing bar
stalso reduce gradually.
Figure 15 adopts commonsense method namely with the (NH of above-mentioned variable concentrations
4)
2sO
4the reinforcement corrosion potential value curve over time recorded in the concrete test block of solution preparation, at same concentration (NH as can be seen from Figure 15 also
4)
2sO
4along with the increase of time in solution, the corrosion potential of reinforcing bar is also first reduce, and to the rise phenomenon starting when about about 30 days to occur in various degree, and also finally tends towards stability; Variable concentrations (NH
4)
2sO
4between solution, with the increase of its concentration, corrosion potential also decreases.
Contrast Figure 14,15 can find out, variation tendency is identical in time for the potential value in Figure 14 and Figure 15 during the reaction of reinforcing bar generation corrosion electrochemistry.As can be seen here, adopt reinforcing bar measured by the inventive method at variable concentrations (NH
4)
2sO
4corrosion regularity in solution and variable concentrations (NH
4)
2sO
4the reinforcement in concrete corrosion regularity of solution preparation has the higher goodness of fit, again can reflect that in concrete, corrosive ions is to the corrosion regularity of reinforcing bar and corrosive nature completely.And utilize the test duration of the whole potential value of reinforcing bar measured by proving installation of the present invention to be starkly lower than the test duration of traditional concrete cladding process, thus there is test period short, the simple advantage of method of testing; As can be seen from the experimental result of Figure 14,15 comparative analysis the inventive method and traditional concrete cladding process, the inventive method is at research variable concentrations (NH
4)
2sO
4solution in the impact of reinforcement corrosion rule and corrosion rate same than conventional concrete cladding process more quick and precisely.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (4)
1. the method for Fast simulation test reinforcement in concrete corrosive nature, is characterized in that, comprise the following steps:
1), get reinforcing bar to be measured and utilize epoxy resin its lateral column face coated;
2), the corrosive liquid of preparation containing corrosive ions;
3), clean the upper and lower end face of polishing reinforcing bar to be measured and reinforcing bar lower surface to be measured is placed in corrosive liquid;
4), corrosive liquid be placed in isoperibol and put into copper electrode and contrast electrode to corrosive liquid;
5) electrochemical workstation record current potential process over time, is utilized.
2. Fast simulation tests the method for reinforcement in concrete corrosive nature according to claim 1, it is characterized in that: terminate also to comprise the iron concentration in measurement corrosive liquid after testing and the step calculating reinforcing bar lower surface corroded area.
3. according to claim 1 or 2, Fast simulation tests the method for reinforcement in concrete corrosive nature, it is characterized in that: utilize special purpose device to test reinforcement in concrete corrosion regularity, this Special testing device comprises and is bolted fixing aluminium alloy plate up and down, between described upper and lower aluminium alloy plate, lower aluminium alloy plate is provided with multiple reagent bottle with array way, described upper aluminium alloy plate and each reagent bottle correspondence position are respectively equipped with copper electrode jack, reference electrode reference electrode plug and reinforcing bar jack.
4. the method for Fast simulation test reinforcement in concrete corrosive nature according to claim 3, it is characterized in that: described reagent bottle volume is 80-120ml, the test duration is 280-320min, and the reinforcing bar lower surface corrosive liquid degree of depth of submerging is 9-12mm.
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| CN106556564A (en) * | 2016-11-16 | 2017-04-05 | 南京钢铁股份有限公司 | A kind of evaluation methodology of concrete reinforcing bars corrosive nature |
| CN115060644A (en) * | 2022-08-17 | 2022-09-16 | 苏州迈创信息技术有限公司 | Method for testing corrosion resistance of steel bar in concrete |
| CN115060644B (en) * | 2022-08-17 | 2022-11-01 | 苏州迈创信息技术有限公司 | Method for testing corrosion resistance of steel bar in concrete |
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Application publication date: 20150909 |