CN104880502B - Simple stimulation apparatus for corrosion and electrochemistry tests in low speed pipeline - Google Patents
Simple stimulation apparatus for corrosion and electrochemistry tests in low speed pipeline Download PDFInfo
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- CN104880502B CN104880502B CN201410071582.2A CN201410071582A CN104880502B CN 104880502 B CN104880502 B CN 104880502B CN 201410071582 A CN201410071582 A CN 201410071582A CN 104880502 B CN104880502 B CN 104880502B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 106
- 230000007797 corrosion Effects 0.000 title claims abstract description 105
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- 230000005518 electrochemistry Effects 0.000 title claims abstract description 10
- 230000000638 stimulation Effects 0.000 title abstract 4
- 238000000840 electrochemical analysis Methods 0.000 claims abstract description 62
- 238000004088 simulation Methods 0.000 claims abstract description 34
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 98
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229920006351 engineering plastic Polymers 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
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- 238000013461 design Methods 0.000 description 3
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
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Abstract
The invention discloses a simple stimulation apparatus for corrosion and electrochemistry tests in a low speed pipeline. The apparatus can realize electrochemical test in a pipeline with the flow speed being smaller than 1m/s in below 75DEG C closed environment with different corrosion media and corrosion simulation acceleration corrosion test in a pipeline with the flow speed being smaller than 3m/s. The apparatus comprises a corrosion solution storage container, a solution circulating and metering system, a simulation pipeline internal corrosion sample chamber and an electrochemical test device. The corrosion solution container is mainly used for storing a large amount of a solution, the solution circulating and metering system comprises a variable frequency magnetic pump and a flow meter, and the flow meter can determine the test flow speed; and the simulation pipeline internal corrosion sample chamber stimulates six o'clock direction corrosion and other tests in a sample stimulation pipeline, and an electrochemical test chamber comprises an electrochemical test interface, a reference electrode and an outside salt bridge. The apparatus has the advantages of great reduction of leakage of hydrogen sulfide and a solution thereof, improvement of the safety of test personnel and environment, convenient and accurate stimulation of corrosion and electrochemical parameter determination in the pipeline under practical conditions, and wide test application range.
Description
Technical field
The present invention relates to low velocity fluid includes etchant solution and oil product, the simulation of wet hydrogen sulfide environment and its mixed gas
Environmental corrosion electrochemistry and corrosion testing field, the simple simulation dress of specially a kind of low speed pipeline corrosion and electro-chemical test
Put, it is capable of achieving to be less than in 75 DEG C of closed different corrosive medium environment less than electro-chemical test in 1m/s flow velocity pipelines and be less than
The pipeline corrosion simulative and accelerated corrosion test of 3m/s flow velocitys.
Background technology
The energy resource supply main body of global industry is still fossil resources, with the demand of economic construction, containing variable concentrations
The oil field of the corrosive environment such as hydrogen sulfide, carbon dioxide be produced, collect defeated and all kinds of etchant solutions, crude corrosively, finished product
Oil, chemical reagent etc. are delivered to all parts of the country in the way of pipeline transportation.Pipeline corrosion is difficult to monitor because it is disguised,
At present conventional method has：1, weld one section on conveying pipe and bypass for testing, 2, using the corresponding stream of rotation electrode simulation
Speed.For method 1, experimental condition and reality have preferable relatedness, but relatively weak to the controlling of experimental condition, are situated between
Matter selects more single so that corrosion has especially been lacked in certain flow rate, temperature and medium to the impact understanding corroded
Whole property, is unfavorable for the complete theory of construction and test framework.For method 2, the linear velocity residing for the rotation of measuring electrode is not
Real fluid velocity, and easily there is convection current etc. in the solution in kettle.Therefore research is in related particular design flow media
Pipeline corrosion behavior and electrochemistry performance and its inherent law, accumulate related data, are the material choosing of petrochemical plant
There is great practical significance with the corresponding standard of construction.
Conveying pipe internal corrosion be it is most common in pipeline transportation, it is most hidden, because the corrosion initial stage is difficult in time discovery, once
Monitor, then corrosion is in Rapid development stage, the space pole that pipeline is often played in the edge of failure, all kinds of Compensation measures
For limited.Corrode in the corrosive medium of flowing and be mainly manifested in the dependency of flow velocity：The corruption of metal surface under certain flow rate
The adhesion and fluid of erosion product film layer and metallic matrix forces to take part the antagonism between the souring of granule, material under certain flow rate
Transport to growth of microorganism, temperature is respectively provided with decisive influence for film layer structure, corrosion kinetics, growth of microorganism.Mesh
It is front there is not yet the report of related such experiment simulator.
The content of the invention
It is an object of the invention to provide the simple analog of a kind of low speed pipeline corrosion and electro-chemical test, the dress
Put achievable closed condition of normal pressure and less under high-temperature（25-75℃）Including the corrosion of wet hydrogen sulfide environment and its mixed gas
Less than electro-chemical test and the pipe less than 3m/s flow velocitys in 1m/s flow velocity pipelines in solution and oil product, simulated environment etchant solution
Internal corrosion simulative and accelerated corrosion test in road provides condition to study the internal corrosion experimental study in pipeline transportation of petrochemical industry material.
The technical scheme is that：
A kind of simple analog of low speed pipeline corrosion and electro-chemical test, the device includes that etchant solution storage follows appearance
Device, simulation pipeline corrosion sample room and electro-chemical test room, it is hermetic container that the etchant solution storage follows container, be which is provided with
Outlet, stretches into storage and follows container bottom, the other end of outlet pipe after one end connection lucite tube of outlet pipe by outlet
Two branch roads are divided into by threeway, two branch roads connect closed again behind simulation pipeline corrosion sample room and electro-chemical test room respectively
And into all the way, i.e. return pipe, the end of return pipe stretches into etchant solution storage and follows container bottom.
The top that the etchant solution storage follows container is provided with upper hose, for solution injection storage to be followed in container, upper hose
It is provided with 316L ball valves II；Storage follows the bottom of container and is provided with emptying solution line, for the solution that discharge storage is followed in container；It is described
Etchant solution storage follows container and controls its interior solution temperature by water-bath.
The electro-chemical test room is cuboid hollow structure, salt bridge is drawn outside test sample, reference electrode and to electrode point
Not Tong Guo the hole opened of electro-chemical test room top insert in it, each hole is sealed by plug；Electro-chemical test room top and
Corrosion resistant plate is placed respectively in lower section, above and below corrosion resistant plate between be bolted and make corrosion resistant plate to plug pressure
The existing sealing to electro-chemical test room of consolidation.
The simulation pipeline corrosion sample room is tubular structure, is provided with the pipeline of tubular corrosion sample room two ends connection
Fixing bolt, corrosion test sample is multiple, is fixed on the fixed spiral shell with the weaving manner of mutually insulated with rope each other
On bolt, to simulate the etch state in 6 the most serious directions of pipeline corrosion.
The outlet pipe is provided with frequency conversion magnetic drive pump and liquid level evacuated tube, and 316L ball valves III are arranged in liquid level evacuated tube；Return
Water pipe is provided with Hall flow meter.
The etchant solution storage is followed in container to include wet hydrogen sulfide environment under the conditions of normal pressure, temperature 25-75 DEG C and its mixing
Close etchant solution and oil product, simulated environment etchant solution of gas etc..
The etchant solution storage follows container and surveys for lucite material, the simulation pipeline corrosion sample room and electrochemistry
Examination its material of room is lucite；The outlet pipe and return pipe are silica gel tube or PPR pipe；It is described emptying solution line be
Lucite tube or PPR pipe.
The etchant solution storage follows container upper end and is additionally provided with air inlet pipe, thermocouple and escape pipe；Stretch into one end of air inlet pipe
Storage follows solution bottom in container, another termination gas cylinder；Stretch into storage and follow in container in solution in the end of thermocouple；Stretch escape pipe one end
Enter that storage is followed in container but its end is in superjacent, another termination exhaust-gas treatment bottle.
The etchant solution storage follows container bottom connection emptying solution line, and emptying solution line passes through water-bath pot bottom,
And 316L ball valves I are set in its end, bolt and gasket seal sealing are taken between emptying solution line and water-bath.
, using tetrafluoro or engineering plastics magnetic drive pump, the outlet liquid level of magnetic drive pump is at least below Chu Xunrong for the frequency conversion magnetic drive pump
Liquid level of solution 10cm in device, the flow velocity of frequency conversion magnetic drive pump should be controlled within 150L/min.
2 centimeters increase glass stopcock above connecting line, to empty gas in pipeline so that entering electro-chemical test
The quartzy tube inner corrosion solution of room and agar are realized conducting in quartz ampoule.
On two branch roads that the outlet pipe is divided into, on simulation pipeline corrosion sample room two ends pipeline 316L is respectively equipped with
Ball valve IV, on the pipeline of electro-chemical test room two ends 316L ball valves V are respectively equipped with.
Design principle of the present invention is as follows：
The simple analog of low speed pipeline corrosion of the present invention and electro-chemical test is provided with etchant solution storage and follows container, molten
Liquid circulates metering system, simulation pipeline corrosion sample room and electrochemical testing device.The etchant solution storage of the device follows appearance
Device, simulation pipeline corrosion sample room and electro-chemical test room are lucite and make, a large amount of normal pressures, temperature 25-75 DEG C
Under the conditions of include that the etchant solution and oil product of wet hydrogen sulfide environment and its mixed gas, simulated environment etchant solution are stored in
Stablizing for container, guarantee test room temperature and solution is followed, water-bath heated solution realizes the temperature control of solution, storage is followed in container
Thermocouple realize the measurement of solution actual temperature.
Solution circulation metering system adopts tetrafluoro or engineering plastics frequency conversion magnetic force pump circulation, towards simulation pipeline corrosion sample
Product room and electro-chemical test room are using ball valve control.Due to the solution container and its blood circulation and simulation pipeline corrosion of employing
Sample room and electro-chemical test room are insulant composition, and electro-chemical test room outreaches salt bridge and is connected with reference electrode in increase
The electrochemical measurement being capable of achieving afterwards in different temperatures, different in flow rate, different medium.Frequency conversion magnetic drive pump does not have self-suction function, full
Under conditions of foot is closed, can realize that magnetic drive pump front end is full of etchant solution entirely using 316L ball valves in liquid level evacuated tube are opened, suddenly
Your effusion meter can determination test flow velocity.The independent collateral branch in simulation pipeline corrosion sample room, can be real on the premise of not abort
The sample of existing electrochemistry is changed.The 6 directions corrosion of arranging using mutually insulated by the way of of simulation pipeline corrosion sample room are tried
Sample, the feature for possessing pipeline corrosion.
Increase by two pairs of corrosion resistant plates on the rubber stopper of three electrodes above electrochemical chamber, two ends are pressed from both sides using fastening bolt
Fasten, be capable of achieving the seal of electro-chemical test room.Its gas feed can be connected with gas flowmeter, also can with mix gas cylinder
The requirement of variable concentrations is realized in connection.
The present invention has the advantage that compared with prior art：
1st, with lucite, silica gel tube is material and other anti-corrosion auxiliary device to the present invention, makes simple and convenient, cost
Cheap, good looking appearance can simplify experimentation and cost-effective.
2nd, solution container of the invention can contain tank solution, can be simultaneously real in the series connection of multiple simulation pipeline corrosion sample rooms
Apply multiple tests, using solution series be effectively reduced solution concentration to test impact, reduce test data error, and
Closed circulation is advantageously implemented the temperature stabilization of etchant solution, is that research pipeline corrosion research creates condition.
3rd, solution room of the invention determines gas flow by effusion meter, can facilitate the wet sulfuration in control corrosion rate solution
Content in the corrosive environments such as hydrogen, is that the corrosion research of different condition creates condition, and cost-effective, makes simple.
4th, small volume of the invention, with reference to water bath with thermostatic control the experimental temperature of simulated solution can be more accurately controlled, can
Realize being less than 75 DEG C, and frequency conversion magnetic drive pump is capable of achieving the control of multiple speed, the electrification of collateral branch under the monitoring of Hall flow meter
Test cabinet is learned, is drawn under salt bridge support simply outer, can easily realize electrochemistry Fast Evaluation and the test of corresponding electrochemical data,
Experimentation is very convenient.
Description of the drawings
Fig. 1 is the simple analog overview of low speed pipeline corrosion and electro-chemical test；
Fig. 2 is pipeline corrosion test specimen layout viewing；
Fig. 3 be low speed pipeline corrosion and electro-chemical test simple analog in electro-chemical test room A-A sections
Figure；
Fig. 4 be low speed pipeline corrosion and electro-chemical test simple analog in electro-chemical test room top view；
Fig. 5 is reference electrode salt bridge ejector in the simple analog of low speed pipeline corrosion and electro-chemical test
Figure.
In figure：1-316L ball valves I；2- is vented solution line；3- sealing bolts；4- gasket seals；5- water-baths；6- corrodes
Solution storage follows container；7- air inlet pipe；8- liquid level evacuated tubes；9-316L ball valves II；10- upper hoses；11- lucite tubes；12- goes out
Trachea；13- frequency conversion magnetic drive pumps；14-316L ball valves III；15- outlet pipes；16- threeways；17-316L ball valves IV；18-316L ball valves
Ⅴ；19- electro-chemical tests room；20- plugs；21- corrosion resistant plates；Draw salt bridge outside 22- reference electrodes；23- return pipes；24- connects
Static line；25- platinum electrodes（To electrode）；26- working electrodes（Test sample）；27- Hall flow meters；It is rotten in 28- simulation pipelines
Erosion sample room；29- fixing bolts I；30- coupons（Corrosion test sample）；31- fixing bolts II；32- agar；33- glass revolves
Valve；34- quartz glass tubes；35- thermocouples.
Specific embodiment
As Figure 1-5, the simple analog of low speed pipeline corrosion of the present invention and electro-chemical test includes that corrosion is molten
Liquid storage follows container 6, simulation pipeline corrosion sample room 28 and electro-chemical test room 19, and etchant solution storage follows container 6 for closed appearance
Device, its upper end is provided with outlet, and lucite tube 11 stretches into storage and follows the bottom of container 6 by outlet, and lucite tube 11 is external
One end of outlet pipe 15, to set gradually on outlet pipe 15 and be divided into two by threeway 16 after frequency conversion magnetic drive pump 13 and liquid level evacuated tube 8
Individual branch road, two branch roads are connected closed by threeway 16 again behind simulation pipeline corrosion sample room 28 and electro-chemical test room 19 respectively
And into all the way, i.e. return pipe 23, return pipe 23 is provided with Hall flow meter 27, and the end of return pipe 23 is stretched into etchant solution storage and followed
The bottom of container 6., using tetrafluoro or engineering plastics magnetic drive pump, the outlet liquid level of magnetic drive pump is at least below storage for the frequency conversion magnetic drive pump 13
Liquid level of solution 10cm in container 6 is followed, the flow velocity of frequency conversion magnetic drive pump should be controlled within 150L/min.Outlet pipe 15 passes through one three
Logical 16 connection liquid level evacuated tube 8, arranges 316L ball valves III 14 in liquid level evacuated tube 8.The outlet pipe 15 and return pipe 23 are silicon
Sebific duct or PPR pipe；
The etchant solution storage is followed in container 6 to include wet hydrogen sulfide environment under the conditions of normal pressure, temperature 25-75 DEG C and its mixing
Close etchant solution and oil product, simulated environment etchant solution of gas etc..It is lucite material that etchant solution storage follows container 6,
Its interior solution temperature is controlled by water-bath 5.Etchant solution storage follows the top of container 6 and is provided with upper hose 10, for will be molten
Liquid injection storage is followed in container 6, and upper hose 10 is provided with 316L ball valves II 9；Emptying solution line 2 is located at etchant solution storage and follows container
Immediately below 6 and follow the bottom of container 6 with etchant solution storage to be connected, for the solution that discharge storage is followed in container 6, be vented solution line
2 pass through the bottom of water-bath 5, take sealing bolt 3 and gasket seal 4 to seal by the bottom of water-bath 5, and emptying solution line 2 is
Lucite tube or PPR pipe, its end arranges 316L ball valves I 1.Etchant solution storage follows the top of container 6 and is integrated bonding
Air inlet pipe 7, the escape pipe 12 and temperature thermo-coupler test mouth of pipe, one end of air inlet pipe 7 stretches into storage and follows solution bottom in container 6, separately
One termination gas cylinder；The one end of escape pipe 12 stretches into that storage is followed in container 6 but its end is in superjacent, another termination exhaust-gas treatment bottle.
The temperature thermo-coupler test mouth of pipe is the blank pipe of lucite half, and bottom is stretched in solution, upper opening insertion PT100 thermocouples
35。
The electro-chemical test room 19 for lucite material cuboid hollow structure, test sample（26）, reference electricity
It is extremely outer to draw salt bridge（22）With to electrode（25）Pass through electro-chemical test room respectively（19）The hole that top is opened is inserted in it, each hole
By plug（20）Sealing；Electro-chemical test room（19）Above and below place corrosion resistant plate respectively（21）, above and below
Corrosion resistant plate（21）Between pass through fixing bolt II（31）Connect and make corrosion resistant plate（21）To plug（20）Compress and realize to electricity
Test chemical room（19）Sealing；
Test sample 26 is placed in electro-chemical test room 19 by the hole opened at an upper portion thereof, and draws salt bridge outside reference electrode
22 and be also that corresponding hole by being opened at an upper portion thereof is inserted wherein to electrode 25, each hole is close by respective plug 20
Envelope, then on plug 20 and the compacting sealing of corrosion resistant plate 21 is placed in the bottom of corresponding electro-chemical test room 19, up and down
It is fixedly connected by fixing bolt II 31 between corrosion resistant plate 21, is respectively equipped with the two ends connecting line of electro-chemical test room 19
316L ball valves V 18.2 centimeters increase glass stopcock 33 on connecting line, to empty gas in pipeline so that entering electrochemistry
The internal corrosion solution of quartz ampoule 34 of test cabinet 19 and agar 32 are realized conducting in quartz ampoule.
Simulation pipeline corrosion sample room 28 is the tubular structure of lucite material, and the tubular corrosion two ends of sample room 28 connect
Fixing bolt I 29 is provided with the pipeline for connecing, is woven in the way of mutually insulated and fixed with rope 24 between corrosion test sample 30
On the fixing bolt I 29 of two side ducts, to simulate the etch state in 6 the most serious directions of pipeline corrosion, simulation pipe
316L ball valves IV 17 are respectively equipped with the two ends pipeline of road internal corrosion sample room 28.
After the connection fastening of above-mentioned pipeline, electro-chemical test sample is installed and corresponding fastening bolt 31 is fixed, subsequently
The corresponding position in electro-chemical test room is fixed on after reference electrode is drawn into salt bridge and platinum electrode insertion plug and fix corresponding
Fastening bolt 31.Corrode installing for sample 30 in simulation pipeline corrosion sample room 28 to adopt earlier than the connection of overall pipeline
The mode of sample mutually insulated is fixed on simulation pipeline corrosion sample room, fixes close with clip after the silica gel tube that two ends are connected afterwards
Close.
After sample is installed in place, the 316L ball valves I 1 that etchant solution storage is followed in the evacuated tube of container 6, water in opening are closed
The injection 15-25L solution of 316L ball valves II 9 above pipe 10, is specifically flexibly determined by the cycle and corrosivity tested, after
All 316L ball valves in addition to 316L ball valves III 14 and glass stopcock are closed, using causing from by the way of the plenum of gas outlet
Outlet pipe 15 is full of solution, closes 316L ball valves III 14, and the temperature of water-bath is set into corresponding temperature, inserts PT100 thermoelectricity
It is even, connect corresponding gas cylinder and tail gas reception device, after whether deoxygenation as requested, be re-filled with the gas of corresponding proportion.
Connection Hall flow meter, opens metering, for the seriality of test, typically can more than 2 groups in parallel of simulation pipeline
Internal corrosion sample room.One group of vacant pipeline corrosion sample room is opened before experiment, if current test is electro-chemical test
The 316L ball valves 17 of the both sides of electro-chemical test room 19 are opened, the 316L balls on vacant simulation pipeline corrosion sample room both sides are closed
Valve 18, the flow velocity for adjusting frequency conversion magnetic drive pump to realize requiring, starts electrochemical test.For simulation pipeline corrosion test is same
The thinking of sample.
Embodiment 1：
In the present embodiment, after corresponding sample is installed, in etchant solution storage follows container 20L NACE solution As are poured into
(5wt%NaCl+0.5wt%HAc) it is, 24 DEG C by water-bath design temperature, closes 316L ball valves 9, empties magnetic drive pump front end air
Be allowed to full of solution, the dissolved oxygen in being passed through 100-200ml/min N2 two hours to remove solution, after adopted according to test requirements document
The speed for taking 200ml/min is filled with H2S toward solution；Start to test the corresponding potential time song of electrochemistry with the flow velocity of 1m/s
Line, dynamic potential polarization curve etc., after the ball valve on simulation pipeline corrosion sample room both sides is opened, close electro-chemical test room two
Side ball valve, opens the corrosion testing under prolonged 1m/s flow velocitys.
Claims (8)
1. the simple analog of a kind of low speed pipeline corrosion and electro-chemical test, it is characterised in that：The device includes corrosion
Solution storage follows container (6), simulation pipeline corrosion sample room (28) and electro-chemical test room (19), and the etchant solution storage follows appearance
Device (6) is hermetic container, which is provided with outlet, and one end connection lucite tube (11) of outlet pipe (15) passes through afterwards outlet
Stretch into storage and follow container (6) bottom, the other end of outlet pipe (15) is divided into two branch roads by threeway (16), and two branch roads connect respectively
Connect and remerged into all the way after simulation pipeline corrosion sample room (28) and electro-chemical test room (19), be i.e. return pipe (23), backwater
Stretch into etchant solution storage and follow container (6) bottom in the end of pipe (23)；
The top that the etchant solution storage follows container (6) is provided with upper hose (10), for solution injection storage to be followed in container (6),
Upper hose (10) is provided with 316L ball valves II (9)；Storage follows the bottom of container (6) and is provided with emptying solution line (2), for discharging storage
The solution followed in container (6)；The etchant solution storage follows container (6) and controls its interior solution temperature by water-bath (5)；
The electro-chemical test room (19) is cuboid hollow structure, draw outside test sample (26), reference electrode salt bridge (22) and
The hole that electrode (25) is opened respectively by electro-chemical test room (19) top is inserted in it, each hole is close by plug (20)
Envelope；Place corrosion resistant plate (21) above and below electro-chemical test room (19) respectively, above and below corrosion resistant plate (21) it
Between connected by fixing bolt II (31) and make corrosion resistant plate (21) to plug (20) compress realize to electro-chemical test room (19)
Sealing；
Simulation pipeline corrosion sample room (28) is tubular structure, in the pipeline of tubular corrosion sample room (28) two ends connection
Fixing bolt I (29) is provided with, corrosion test sample (30) is multiple, each other with rope (24) with the weaving manner of mutually insulated
It is fixed on the fixing bolt I (29)；
Velocity of medium manages interior medium less than 1m/s and in corrosion testing in pipe when the low speed pipeline refers to electro-chemical test
Pipeline of the flow velocity less than 3m/s.
2. the simple analog of low speed pipeline corrosion according to claim 1 and electro-chemical test, it is characterised in that：
The outlet pipe (15) is provided with frequency conversion magnetic drive pump (13) and liquid level evacuated tube (8), and 316L ball valves are arranged in liquid level evacuated tube (8)
Ⅲ(14)；Return pipe (23) is provided with Hall flow meter (27).
3. the simple analog of low speed pipeline corrosion according to claim 1 and electro-chemical test, it is characterised in that：
Etchant solution storage follow in container (6) for the etchant solution that includes wet hydrogen sulfide environment under the conditions of normal pressure, temperature 25-75 DEG C with
And oil product, simulated environment etchant solution.
4. the simple analog of low speed pipeline corrosion according to claim 2 and electro-chemical test, it is characterised in that：
The etchant solution storage follows container (6) for lucite material, and the simulation pipeline corrosion sample room (28) and electrochemistry are surveyed
Examination room (19) its material is lucite；The outlet pipe (15) and return pipe (23) are silica gel tube or PPR pipe；It is described to put
Empty solution line (2) is lucite tube or PPR pipe.
5. the simple analog of low speed pipeline corrosion according to claim 1 and electro-chemical test, it is characterised in that：
The etchant solution storage follows container (6) upper end and is additionally provided with air inlet pipe (7), thermocouple (35) and escape pipe (12)；Air inlet pipe (7)
Stretch into storage and follow the interior solution bottom of container (6), another termination gas cylinder in one end；Stretch into storage and follow in container (6) in the end of thermocouple (35)
In solution；Escape pipe (12) one end stretches into that storage is followed in container (6) but its end is in superjacent, another termination exhaust-gas treatment bottle.
6. the simple analog of low speed pipeline corrosion according to claim 1 and electro-chemical test, it is characterised in that：
The etchant solution storage follows container (6) bottom connection emptying solution line (2), and emptying solution line (2) is through water-bath (5) bottom
Portion, and 316L ball valves I (1) are set in its end, take between emptying solution line (2) and water-bath (5) sealing bolt (3) and
Gasket seal (4) is sealed.
7. the simple analog of low speed pipeline corrosion according to claim 2 and electro-chemical test, it is characterised in that：
The frequency conversion magnetic drive pump (13) follows container using tetrafluoro or engineering plastics magnetic drive pump, the outlet liquid level of magnetic drive pump at least below storage
(6) interior liquid level of solution 10cm, the flow velocity of frequency conversion magnetic drive pump should be controlled within 150L/min.
8. the simple analog of low speed pipeline corrosion according to claim 1 and electro-chemical test, it is characterised in that：
On two branch roads that the outlet pipe (15) is divided into, on the pipeline of simulation pipeline corrosion sample room (28) two ends 316L is respectively equipped with
Ball valve IV (17), on the pipeline of electro-chemical test room (19) two ends 316L ball valves V (18) are respectively equipped with.
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| CN105223128A (en) * | 2015-09-21 | 2016-01-06 | 东南大学 | The power station flowing accelerated corrosion simulated experiment piping installation of electrochemical measurement mode |
| CN105823703B (en) * | 2016-05-24 | 2018-05-01 | 西南石油大学 | It is a kind of to wash away under operating mode the device and method for evaluating inhibitor film integrality |
| CN108152190B (en) * | 2016-12-06 | 2020-08-11 | 中国石油天然气股份有限公司 | Method and device for determining pipe cleaning period of long-distance liquid conveying pipeline |
| CN107179274B (en) * | 2017-05-09 | 2019-10-11 | 常州大学 | Simulate the experimental provision of pipeline corrosion |
| CN109187325B (en) * | 2018-10-18 | 2020-07-28 | 中国水利水电科学研究院 | Accelerated simulation experiment device and method for corrosion fracture process of PCCP (prestressed concrete cylinder pipe) |
| CN111443029B (en) * | 2020-03-23 | 2023-07-25 | 中国石油天然气集团有限公司 | Simulation device and simulation method for hydrogen sulfide corrosion pipe |
| CN115575308B (en) * | 2022-08-25 | 2024-07-19 | 哈尔滨工业大学 | Electrochemical corrosion device and test method for FRP reinforced defective pipeline |
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