CN206601327U - A kind of electrochemical test experiment device for simulating crevice corrosion - Google Patents
A kind of electrochemical test experiment device for simulating crevice corrosion Download PDFInfo
- Publication number
- CN206601327U CN206601327U CN201720202425.XU CN201720202425U CN206601327U CN 206601327 U CN206601327 U CN 206601327U CN 201720202425 U CN201720202425 U CN 201720202425U CN 206601327 U CN206601327 U CN 206601327U
- Authority
- CN
- China
- Prior art keywords
- solution pool
- interior
- sample
- crevice corrosion
- simulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A kind of electrochemical test experiment device for simulating crevice corrosion, outer solution pool top cover is provided with air inlet pipe and blast pipe；Outer sample is suspended in outer solution pool by counter electrode lead；Outer solution pool bottom is connected by feed tube with interior solution pool bottom；Exhaust tube, minisize pH electrode and Luggin capillary salt bridge are provided with the top of interior solution pool；Interior solution pool is sealed by sample pressure head；Interior sample is provided with the left end of sample pressure head；Interior sample connects working electrode；Corrosive environment outside outer solution pool simulation gap；Corrosive environment in interior solution pool simulation gap；Air inlet pipe is given in outer solution pool and is passed through CO2, H2S gas with various；The internal solution pool of exhaust tube is vacuumized；Outer sample, interior sample and Luggin capillary salt bridge composition three-electrode system can carry out the real-time collection of Electrochemistry Information；The crevice corrosion behavior evaluation under the conditions of different solutions, atmosphere, temperature and gap size is completed, can anti-crevice corrosion behavior of the test material under different electrochemical parameters.
Description
Technical field
The utility model belongs to simulation crevice corrosion technical field, and in particular to a kind of electrochemical test of simulation crevice corrosion
Experiment device.
Background technology
For the components such as riveting, welding, threaded connection and flange side surface, when between metal and metal or golden
When the corrosive medium for belonging to and existing between nonmetallic in gap, and gap is in viscous flow state, it is easy to cause at gap
This phenomenon, is typically called crevice corrosion by the local corrosion of metal material.During generation crevice corrosion, the dissolving of gap internal anode
The product of process is restricted to external diffusion so that metal cation concentration rise and positive excess in gap, promotes gap
Outer Cl- is migrated into gap.The hydrolysis of metal chloride make it that pH value declines in gap, has further speeded up anodic solution.Sun
The acceleration of pole dissolving causes more Cl- to move into again, and gap interior chloride concentration increase, and chloride hydrolysis causes gap again
Interior pH value further declines.A self-catalysis process is thus formed, corrosion of metal dissolution velocity in gap is accelerated.
For the evaluation of the anti-crevice corrosion behavior of metal material, the current standard of Main Basiss ASTM G48 and GB/T 10127
Carry out.But method as defined in the two standards is all carried out under given conditions, i.e., material can not be reflected in actual condition
Under the conditions of anti-crevice corrosion behavior, the process and mechanism of crevice corrosion can not be reflected.Patent document【CN 103528944A】
Although disclosed experimental rig can gather Electrochemistry Information during crevice corrosion in real time, help to obtain the part machine of crevice corrosion
Reason, but the real-time change situation of the pH value the most key to gap corrosion impact on the one hand can not be obtained, on the other hand also deposit
The problems such as can not simulate closer to the corrosive environment of operating mode.
The content of the invention
To overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of experiment for simulating crevice corrosion
Device, corrosive medium completes different solutions, gas in this core feature of viscous flow state when the device can embody crevice corrosion
Crevice corrosion behavior evaluation under the conditions of atmosphere, temperature and gap size, the pH of viscous flow medium in corrosion process can be measured in real time
The electrochemical parameter of value changes rule and material surface, and being capable of crevice corrosion of the test material under different electrochemical parameters
Energy.
To achieve the above object, the technical solution adopted in the utility model is：A kind of experimental rig for simulating crevice corrosion,
Include outer solution pool, outer solution pool top cover is provided with air inlet pipe and blast pipe；Outer sample is suspended in outer molten by counter electrode lead
In liquid pool；Outer solution pool bottom is connected by feed tube with interior solution pool bottom；Set successively from left to right at the top of interior solution pool
There are exhaust tube, minisize pH electrode and capillary；The right side of interior solution pool is sealed by sample pressure head；On a left side for sample pressure head
End is provided with the left of interior sample, interior sample and is provided with polytetrafluoroethylene gasket；Interior sample connects electrochemistry work by working electrode lead
Make the working electrode stood.
Hole is provided between the right side wall of described outer solution pool and interior solution pool left side wall.
The exposed area of described interior sample in the solution is about 1cm2。
Described exhaust tube connection external vacuum equipment.
Described capillary connects the reference electrode of electrochemical workstation as salt bridge.
Described counter electrode lead, working electrode lead use copper cash.
Described capillary uses Luggin capillary.
The beneficial effects of the utility model are：
Due to provided with outer solution pool, it is possible to simulate the corrosive environment outside gap；Due to provided with interior solution pool, so can
To simulate the corrosive environment in gap；Due to being provided with hole between outer solution pool and interior solution pool, it is possible to simulate different seams
Gap width；Because outer solution pool is provided with air inlet pipe, it is possible to being passed through the different gas such as CO2, H2S in outer solution pool,
Form different corrosive environments；Because exhaust tube is connected with vacuum equipment, so internally solution pool can vacuumize, it is interior molten to avoid
Oxygen in liquid pool produces influence to test；Because outer sample, interior sample and capillary constitute three-electrode system, so can carry out
The real-time collection of Electrochemistry Information；Crevice corrosion feature that can be with test material under different additional electrical parameters；The device is put
In different isoperibols, the crevice corrosion properties study under different temperatures can be carried out.
The utility model is simple in construction, can not only reflect anti-crevice corrosion behavior of the material under actual working conditions,
The process and mechanism of crevice corrosion can be reflected.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In Fig. 1,1-outer solution pool；2-blast pipe；3-air inlet pipe；4-counter electrode lead；5-outer sample；6-enter
Liquid pipe；7-hole；8-polytetrafluoroethylene gasket；9-interior sample；10-sample pressure head；11-exhaust tube；12-minisize pH electricity
Pole；13-capillary；14-interior solution pool；15-working electrode lead.
Embodiment
Structural principle of the present utility model and operation principle are described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of experimental rig of simulation crevice corrosion includes outer solution pool 1, and the outer top cover of solution pool 1 is provided with
The blast pipe 2 of air inlet pipe 3；Outer sample 5 is suspended in outer solution pool 1 by counter electrode lead 4；The outer bottom of solution pool 1 passes through feed liquor
Pipe 6 is connected with the interior bottom of solution pool 14；The interior top of solution pool 14 is sequentially provided with exhaust tube 11, minisize pH electrode 12 from left to right
With capillary 13；The right side of interior solution pool 14 is sealed by sample pressure head 10；Interior examination is provided with the left end of sample pressure head 10
Sample 9, the interior left side of sample 9 is provided with polytetrafluoroethylene gasket 8；Interior sample 9 connects electrochemical workstation by working electrode lead 15
Working electrode.
Hole 7 is provided between the right side wall and the left side wall of interior solution pool 14 of described outer solution pool 1.
The exposed area of described interior sample 9 in the solution is about 1cm2.
The described connection external vacuum equipment of exhaust tube 11.
Described capillary 13 connects the reference electrode of electrochemical workstation as salt bridge.
Described counter electrode lead 4, working electrode lead 15 use copper cash.
Described capillary 13 uses Luggin capillary.
Outer solution pool 1 is used for simulating the corrosive environment outside gap, and interior solution pool 14 is used for simulating the corrosive environment in gap,
Outer solution pool, interior solution pool are connected by hole 7；The porous material of Different porosities can be filled in hole 7, it is different for simulating
Gap width；Air inlet pipe 3 is used to, to the different gas such as CO2, H2S is passed through in outer solution pool 1, form different corrosive environments,
Unnecessary gas is handled by the discharge of blast pipe 2；Feed tube 6 is used to the liquid in outer solution pool 1 introducing interior solution pool 14；Pumping
Pipe 11 connects external vacuum equipment, and internal solution pool 14 is vacuumized, to avoid the oxygen in interior solution pool from producing influence to test.
Minisize pH electrode 12 can be internally in solution pool 14 solution ph measured in real time；Outer sample 5 is used for simulating outside gap
Material, the copper conductor 4 being welded thereon connects the auxiliary electrode of electrochemical workstation；Interior sample 9 is used for simulating the material in gap
Material, the copper conductor 15 being welded thereon connects the working electrode of electrochemical workstation；Capillary 13 connects electrochemistry as salt bridge
The reference electrode of work station.So, outer sample 5, interior sample 9 and capillary 13（Connect reference electrode）Constitute three-electrode system,
The real-time collection of Electrochemistry Information can be carried out after connection electrochemical workstation.Polytetrafluoroethylene gasket 8 is placed in the interior side of sample 9,
The solution in internal solution pool 14 is screwed by the screw thread of sample pressure head 10 to be sealed, while by polytetrafluoroethylene gasket 8
Footpath ensures that the interior exposed area of sample 9 in the solution is about 1cm2.Change the parameter of electrochemical workstation, can be existed with test material
Crevice corrosion feature under different additional electrical parameters；The device is placed in different isoperibols, different temperatures can be carried out
Under crevice corrosion properties study.
Test sample needed for preparing, wherein interior sample 9 is processed into disc, outer sample 5 is processed into square shape sheet, inside and outside sample
Area than control 1:Within 50, and burn-on respectively on outer sample 5, interior sample 9 lead 4 and lead 15., will during test
Polytetrafluoroethylene gasket 8 is placed in interior sample 9 close to interior solution pool side, screws the screw thread of sample pressure head 10, compresses the interior He of sample 9
Polytetrafluoroethylene gasket 8.The valve closed on feed tube 6 and exhaust tube 11.The solution configured is injected into outer solution pool 1, lid
Good lid is simultaneously sealed.Lead 4, lead 15 and capillary salt bridge 13 are connected respectively to the auxiliary electrode of electrochemical workstation, work
Make on electrode and reference electrode, and notice that the solder joint of lead 4 and outer sample 5 insulate with solution.
Nitrogen is passed through to solution deoxygenation from air inlet pipe 3, and source of the gas is changed into CO2 gases, simulation CO2 corrosion after about 1 hour
Environment.The internal solution pool 14 of valve opened on exhaust tube 11 is vacuumized, and then opens the valve on feed tube 6 so that outer molten
Solution in liquid pool 1 enters interior solution pool 14.After interior solution pool 14 is full of solution, close on exhaust tube 11 and feed tube 6
Valve.Start electrochemical workstation, electrochemical operation parameter is set, Electrochemistry Information of the sample in corrosion process is carried out real
When measure.Meanwhile, pass through pH electrodes 12, the pH value of the interior solution of measurement in real time.
To influence of the test gap size to material cracks corrosive nature, can in aperture 7 filling pore rate it is different
Each polyporous materials, form different degrees of viscous flow effect.
Claims (6)
1. a kind of experimental rig for simulating crevice corrosion, it is characterised in that include outer solution pool（1）, outer solution pool（1）Top cover
Provided with air inlet pipe（3）And blast pipe（2）；Outer sample（5）Pass through counter electrode lead（4）It is suspended in outer solution pool（1）It is interior；Outer solution
Pond（1）Bottom passes through feed tube（6）With interior solution pool（14）Bottom is connected；Interior solution pool（14）Top is set successively from left to right
There is exhaust tube（11）, minisize pH electrode（12）And capillary（13）；Interior solution pool（14）Right side pass through sample pressure head（10）Enter
Row sealing；In sample pressure head（10）Left end be provided with interior sample（9）, interior sample（9）Left side is provided with polytetrafluoroethylene gasket（8）；
Interior sample（9）Pass through working electrode lead（15）Connect the working electrode of electrochemical workstation.
2. a kind of experimental rig for simulating crevice corrosion according to claim 1, it is characterised in that described outer solution pool
（1）Right side wall and interior solution pool（14）Hole is provided between left side wall（7）.
3. a kind of experimental rig for simulating crevice corrosion according to claim 1, it is characterised in that described interior sample
（9）Exposed area in the solution is about 1cm2。
4. a kind of experimental rig for simulating crevice corrosion according to claim 1, it is characterised in that described exhaust tube
（11）Connect external vacuum equipment.
5. a kind of experimental rig for simulating crevice corrosion according to claim 1, it is characterised in that the feed tube（6）
On be provided with valve.
6. a kind of experimental rig for simulating crevice corrosion according to claim 1, it is characterised in that the exhaust tube（11）
On be provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202425.XU CN206601327U (en) | 2017-03-03 | 2017-03-03 | A kind of electrochemical test experiment device for simulating crevice corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202425.XU CN206601327U (en) | 2017-03-03 | 2017-03-03 | A kind of electrochemical test experiment device for simulating crevice corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206601327U true CN206601327U (en) | 2017-10-31 |
Family
ID=60147982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720202425.XU Expired - Fee Related CN206601327U (en) | 2017-03-03 | 2017-03-03 | A kind of electrochemical test experiment device for simulating crevice corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206601327U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063990A (en) * | 2017-03-03 | 2017-08-18 | 西安石油大学 | A kind of electrochemical test experiment device for simulating crevice corrosion |
| CN109142202A (en) * | 2018-08-03 | 2019-01-04 | 苏州热工研究院有限公司 | A kind of gap environmental stress corrosion susceptibility high throughput evaluating apparatus and method |
| CN109211771A (en) * | 2018-11-30 | 2019-01-15 | 中国工程物理研究院材料研究所 | A kind of active metal surface corrosion behavior measurement device and method |
| CN110208177A (en) * | 2019-06-21 | 2019-09-06 | 中国特种设备检测研究院 | Electrochemical experimental device |
| CN111650118A (en) * | 2020-07-10 | 2020-09-11 | 中国民航大学 | Electrochemical corrosion system for evaluating local corrosion performance of aircraft structure and working method |
| CN113791170A (en) * | 2021-09-07 | 2021-12-14 | 国网北京市电力公司 | Cable buffer layer ablation transfer characteristic simulation device and method |
-
2017
- 2017-03-03 CN CN201720202425.XU patent/CN206601327U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063990A (en) * | 2017-03-03 | 2017-08-18 | 西安石油大学 | A kind of electrochemical test experiment device for simulating crevice corrosion |
| CN107063990B (en) * | 2017-03-03 | 2023-03-31 | 西安石油大学 | Electrochemical test device for simulating crevice corrosion |
| CN109142202A (en) * | 2018-08-03 | 2019-01-04 | 苏州热工研究院有限公司 | A kind of gap environmental stress corrosion susceptibility high throughput evaluating apparatus and method |
| CN109142202B (en) * | 2018-08-03 | 2020-11-10 | 苏州热工研究院有限公司 | High-flux evaluation device and method for stress corrosion sensitivity of slit environment |
| CN109211771A (en) * | 2018-11-30 | 2019-01-15 | 中国工程物理研究院材料研究所 | A kind of active metal surface corrosion behavior measurement device and method |
| CN109211771B (en) * | 2018-11-30 | 2020-12-15 | 中国工程物理研究院材料研究所 | Active metal surface corrosion behavior determination device and method |
| CN110208177A (en) * | 2019-06-21 | 2019-09-06 | 中国特种设备检测研究院 | Electrochemical experimental device |
| CN110208177B (en) * | 2019-06-21 | 2021-06-11 | 中国特种设备检测研究院 | Electrochemical experimental device |
| CN111650118A (en) * | 2020-07-10 | 2020-09-11 | 中国民航大学 | Electrochemical corrosion system for evaluating local corrosion performance of aircraft structure and working method |
| CN113791170A (en) * | 2021-09-07 | 2021-12-14 | 国网北京市电力公司 | Cable buffer layer ablation transfer characteristic simulation device and method |
| CN113791170B (en) * | 2021-09-07 | 2023-11-03 | 国网北京市电力公司 | Device and method for simulating ablation transfer characteristics of cable buffer layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206601327U (en) | A kind of electrochemical test experiment device for simulating crevice corrosion | |
| CN107063990A (en) | A kind of electrochemical test experiment device for simulating crevice corrosion | |
| CN103293094B (en) | A kind of electro-chemical measuring apparatus and using method thereof that quantitatively can change thickness of liquid film | |
| CN106525709A (en) | Electrochemical corrosion test apparatus and application method thereof | |
| CN106525710A (en) | Electrochemical testing device for acoustic-emission-testing-material corrosion performance and application method thereof | |
| CN107941686B (en) | Test simulation platform for researching electrochemical corrosion of iron pipeline and water quality change of pipe network | |
| CN103792182B (en) | A kind of double-electrolyzer and application of simulating underdeposit corrosion | |
| CN109520919B (en) | Simulation device and method for online detection of oil-water interface corrosion of multiphase mixed transportation pipeline | |
| CN105067509B (en) | Crude oil storage tank corrosion monitor | |
| CN110274870A (en) | Controllable gap corrosion test device and method | |
| CN104950024A (en) | Device and method for measuring hydrogen diffusion coefficient | |
| CN109211772A (en) | A method of accelerating soldered fitting corrosion fatigue test | |
| CN103940727A (en) | Testing device for simulating high-temperature high-pressure flow corrosion of ground surface pipeline | |
| CN111024604A (en) | Corrosion and scaling experiment detection system and method for geothermal water heat exchange process | |
| CN203310734U (en) | Electrochemical measurement device capable of quantitatively changing thickness of liquid membrane | |
| CN206311482U (en) | For the sample clamp of electrochemical corrosion test | |
| CN109374518A (en) | A kind of test device and method of the corrosion of simulation nuclear waste storage tank gas-liquid interface | |
| CN206736361U (en) | A kind of cathode protection device of metal in Simulated Soil Solution | |
| CN206788099U (en) | A kind of electrochemical testing device of measurable current efficiency | |
| CN204422386U (en) | A kind of electrochemical reactor | |
| CN207066949U (en) | Water piping system corrosion electrochemical test system is regenerated under current system | |
| CN104359955B (en) | A kind of Novel electrolytic tank | |
| CN112540109B (en) | Method and device for synchronously calculating hydrogen evolution quantity during electrochemical test | |
| CN203838037U (en) | Device for measuring down-well tubular column corrosion rate of fume | |
| CN203941237U (en) | A kind of dynamic oil water mixed liquid electric conductivity test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171031 Termination date: 20180303 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |