CN2638063Y - Electrolytic cell with imitation local corrosion - Google Patents
Electrolytic cell with imitation local corrosion Download PDFInfo
- Publication number
- CN2638063Y CN2638063Y CN 03284871 CN03284871U CN2638063Y CN 2638063 Y CN2638063 Y CN 2638063Y CN 03284871 CN03284871 CN 03284871 CN 03284871 U CN03284871 U CN 03284871U CN 2638063 Y CN2638063 Y CN 2638063Y
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- sealing chamber
- chamber
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Abstract
The utility model discloses a simulated partial corrosion electrolytic cell which is provided with an open chamber and a sealing chamber that are poured with the conducting medium, a salt bridge is arranged between the two chambers, samples are positioned respectively in the two chambers, and a composite electrode and an acid buret are positioned respectively in a sealing chamber; in the sealing chamber, a metal (or an alloy) coating sample and a carbon steel sample form a galvanic electrode, and are connected with the metal (or an alloy) coating sample in the open chamber through a zero-resistance galvanometer and a commutation switch and constitute a loop to measure the galvanic current with the conducting medium. In the open chamber, the sample forms a loop with the salt bridge and the conducting medium through the commutation switch, a high impedance voltmeter, a saturation mercury electrode and a luggin capillary; in the sealing chamber, the sample forms the galvanic electrode and constitutes a loop with the conducting medium through the voltmeter, the commutation switch, the saturation mercury electrode and the luggin capillary; a pipe that is used to go through the nitrogen stretches into the bottom of the sealing chamber, and the sealing chamber is communicated with a conical flask A and a conical flask B that are filled with the lye. The utility model can quickly obtain the related information of the anti partial corrosion resistance performance of the material.
Description
Technical field
The utility model relates to the local corrosion analogue technique, particularly a kind of electrolytic cell of simulating local corrosion.
Background technology
Coating such as galvanizing by dipping, aluminium, allumen, admiro use in seawater, synthetic sea water and sodium chloride solution, and when coating surface forms corrosion product, because mass transfer difficulty between coating hole inside and the bulk solution, the variation of conditions such as the reduction of hole internal pH-values, chlorion enrichment can appear, thus the situation of local corrosion.At present, go back neither one is simulated this phenomenon with suitable method report.
The utility model content
The purpose of this utility model provides a kind of electrolytic cell that can obtain the relevant information of the anti-local corrosion performance of material fast, can simulate the electrolytic cell of the simulation local corrosion of the hot-dip coated localized corrosion problems that is caused when using in seawater, synthetic sea water and sodium chloride solution.
To achieve these goals, the technical scheme that the utility model adopted is:
Electrolytic cell has an open chamber and a sealing chamber, in open chamber, sealing chamber, inject conducting medium, between establish salt bridge, the metal or alloy identical with Coating composition (following coated metal or the alloy of all abbreviating as) sample is placed in respectively in two chambers, and combination electrode, carbon steel sample, acid buret are placed in the sealing chamber respectively; In sealing chamber, coated metal (or alloy) sample and carbon steel sample are formed a galvanic couple electrode, and link to each other with coated metal (or alloy) sample of open chamber by zero resistance galvanometer, reversing switch b end, with the measurement loop of salt bridge and conducting medium formation galvanic couple electric current; In the open chamber, coated metal (or alloy) sample links to each other by reversing switch a end, high impedance voltmeter, saturated calomel electrode A, Luggin capillary, constitutes the loop of the corrosion potential that can measure coated metal (or alloy) sample with conducting medium; (or alloy) sample of coated metal in the sealing chamber and carbon steel sample are formed the galvanic couple electrode, link to each other by high impedance voltmeter, reversing switch a end, saturated calomel electrode B, Luggin capillary, constitute the loop that can measure the galvanic couple current potential with conducting medium; The logical nitrogen that is provided with valve with conduit stretch into sealing chamber, to its bottom, sealing chamber also communicates with the conical flask A that fills alkali lye by conduit, conical flask A communicates with the conical flask B that fills water by conduit; Open chamber, sealing chamber bottom are installed a draining valve respectively; Sealing chamber is installed a water filling port;
Be provided with packoff between the bottleneck of conical flask A, conical flask B and salt bridge, combination electrode, acid buret, conduit and the sealing chamber; Open chamber and sealing chamber are measure-alike; Coated metal or alloy can be zinc, aluminium, allumen or admiro; Conducting medium in open chamber and the sealing chamber can be seawater, synthetic sea water and sodium chloride solution.
The utlity model has following advantage:
The utility model can be applicable to simulate that coating such as galvanizing by dipping, aluminium, allumen, admiro use and when coating surface forms corrosion product in seawater, synthetic sea water and sodium chloride solution, because mass transfer difficulty between coating hole inside and the bulk solution, the variation of conditions such as the reduction of hole internal pH-values, chlorion enrichment occurs, thereby cause the situation of local corrosion.Can obtain the result close in the short period of time, thereby obtain the relevant information of the anti-local corrosion performance of material fast, can select work material with reality.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with specific embodiment in detail the present invention is described in detail.
Embodiment 1
The utlity model has a pair of tank room, be open chamber 1, sealing chamber 2, in open chamber 1, sealing chamber 2 (measure-alike), inject conducting medium 15 (natural sea-water, artificial seawater or NaCl solution), connect by salt bridge 7 between 1 and 2, two blocks of coated metals (or alloy) sample 4 is placed in respectively in two chambers, and combination electrode 9 (survey pH value with), carbon steel sample 5, acid buret 10 are placed in 2 li of sealing chambers respectively.In sealing chamber 2, coated metal (alloy) sample 4 and carbon steel sample 5 are formed a galvanic couple electrode, this galvanic couple electrode links to each other with coated metal (or alloy) sample 4 of open chamber 1 by zero resistance galvanometer 3, reversing switch 16b end, constitutes the loop of measuring the galvanic couple electric current by conducting medium 15 and salt bridge 7; In the open chamber 1, coated metal (or alloy) sample 4, link to each other by reversing switch 16a end, high impedance voltmeter 6, saturated calomel electrode A12, Luggin capillary 11, constitute the loop, can measure the corrosion potential of coated metal (or alloy) sample 4 with conducting medium 15; In the sealing chamber 2, coated metal (or alloy) sample 4 and carbon steel sample 5 are formed the galvanic couple electrode, link to each other by high impedance voltmeter 6, reversing switch 16a end, saturated calomel electrode B13, Luggin capillary 11, constitute the loop, can measure the galvanic couple current potential with conducting medium 15; On the acid buret 10 cock is arranged, be used to regulate rate of addition, outside N
2By a valve 17, be used to control ventilation speed, logical nitrogen with conduit 18 stretch into sealing chamber 2, bottom it, sealing chamber 2 also communicates with the conical flask A 20 that fills alkali lye (absorbing the HCl gas that goes out with air) by conduit 18, and conical flask A 20 communicates with the conical flask B 21 that fills water (absorbing the HCl gas that goes out with air) by conduit 18; Open chamber 1, sealing chamber 2 bottoms are installed a draining valve 19 respectively; Sealing chamber 2 is installed a water filling port 14, is used to inject conducting medium 15 (as seawater); The bottleneck of conical flask A 20, conical flask B 21 is established stopper 8 sealings; Be provided with rubber stopper 8 sealings between salt bridge 7, combination electrode 9, acid buret 10, conduit 17 and the sealing chamber 2.
Present embodiment conducting medium 15 can be natural sea-water, all need inject an amount of conducting medium 15 when use two Room, and coated metal (or alloy) sample 4 can be admiro.
Before the test beginning, in sealing chamber 2, feed nitrogen earlier in the conducting medium 15 (seawater) to drive oxygen wherein, to simulate anaerobic environment approx; In the experiment, keep logical N
2Drip HCl solution by acid buret 10, simulate the reduction of pH value in the hole and the increase of chlorine ion concentration.Measure in the open chamber 1 corrosion potential as coated metal (or alloy) sample 4 of electrode, the galvanic couple current potential of galvanic couple [forming] in the sealing chamber 2 by coated metal (or alloy) sample 4 and carbon steel sample 5, external circuit galvanic couple electric current the size and over time, when the eelctric dipole sex reversal, record critical pH, chlorine ion concentration and the test duration.
The utility model principle is:
Design two chambers, open chamber 1, sealing chamber 2 are measure-alike, situation during with simulation coat of metal generation local corrosion, that is: the outside coating of open chamber 1 simulation is in open aerobic environment, the coating of sealing chamber 2 simulation inside, space and the anaerobic environment that base metal is in relative closure.The meaning of this simulation electrolytic cell mainly is, critical pH, chlorine ion concentration and test duration when contrasting the galvanic couple generation eelctric dipole sex reversal that different hot-dip coated and carbon steel constitutes, and the corrosion situation of steel surface, can hot-dip coatedly provide foundation for studying to local sensitivity of corrosion.
Claims (5)
1. electrolytic cell of simulating local corrosion, it is characterized in that: have an open chamber (1) and a sealing chamber (2), in open chamber (1), sealing chamber (2), annotate conducting medium (15), between establish salt bridge (7), coated metal or alloy sample (4) are placed in respectively in two chambers, and combination electrode (9), carbon steel sample (5), acid buret (10) are placed in sealing chamber (2) lining respectively; In sealing chamber (2), coated metal or alloy sample (4) and carbon steel sample (5) are formed a galvanic couple electrode, and link to each other with the coated metal or the alloy sample (4) of open chamber (1) by zero resistance galvanometer (3), reversing switch (16) b end, with the loop of salt bridge (7) and conducting medium (15) formation measurement galvanic couple electric current; In the open chamber (1), coated metal or alloy sample (4), link to each other by reversing switch (16) a end, high impedance voltmeter (6), saturated calomel electrode A (12), Luggin capillary (11), constitute the loop of the corrosion potential that can measure coated metal or alloy sample (4) with conducting medium (15); Coated metal or alloy (4) and carbon steel sample (5) are formed the galvanic couple electrode in the sealing chamber (2), link to each other by high impedance voltmeter (6), reversing switch (16) a end, saturated calomel electrode B (13), Luggin capillary (11), constitute the loop that to measure the galvanic couple current potential with conducting medium (15); The logical nitrogen that is provided with valve (17) with conduit (18) stretch into sealing chamber (2), to its bottom, sealing chamber (2) also communicates with the conical flask A (20) that fills alkali lye by conduit (18), and conical flask A (20) communicates with the conical flask B (21) that fills water by conduit (18); Open chamber (1), sealing chamber (2) bottom are installed a draining valve (19) respectively; Sealing chamber (2) is installed a water filling port (14).
2. according to the electrolytic cell of the described simulation local corrosion of claim 1, it is characterized in that: be provided with packoff between the bottleneck of conical flask A (20), conical flask B (21) and salt bridge (7), combination electrode (9), acid buret (10), conduit (18) and the sealing chamber (2).
3. according to the electrolytic cell of the described simulation local corrosion of claim 1, it is characterized in that: open chamber (1) and sealing chamber (2) are measure-alike.
4. according to the electrolytic cell of the described simulation local corrosion of claim 1, it is characterized in that: coated metal or alloy 4 can be zinc, aluminium, allumen or admiro.
5. according to the electrolytic cell of the described simulation local corrosion of claim 1, it is characterized in that: the conducting medium in open chamber (1) and the sealing chamber (2) can be seawater, synthetic sea water and sodium chloride solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03284871 CN2638063Y (en) | 2003-08-27 | 2003-08-27 | Electrolytic cell with imitation local corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03284871 CN2638063Y (en) | 2003-08-27 | 2003-08-27 | Electrolytic cell with imitation local corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2638063Y true CN2638063Y (en) | 2004-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03284871 Expired - Fee Related CN2638063Y (en) | 2003-08-27 | 2003-08-27 | Electrolytic cell with imitation local corrosion |
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| CN (1) | CN2638063Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100510696C (en) * | 2006-12-01 | 2009-07-08 | 中国科学院海洋研究所 | Apparatus and method for researching erosion sensibility of stress in air under the condition of dynamic load |
| CN101787556B (en) * | 2009-01-23 | 2012-02-01 | 中国科学院海洋研究所 | Electrolytic cell |
| CN103792182A (en) * | 2014-02-26 | 2014-05-14 | 中国石油大学(华东) | Double-electrolytic tank for simulating under-deposit corrosion and application |
| CN107228820A (en) * | 2017-06-14 | 2017-10-03 | 华电电力科学研究院 | Simulation test device and method of a kind of oxide skin dissolution to parent metal material |
| CN108070865A (en) * | 2016-11-08 | 2018-05-25 | 中国石油天然气股份有限公司 | Data acquisition method and device |
| CN108362540A (en) * | 2018-03-30 | 2018-08-03 | 中国工程物理研究院流体物理研究所 | A method of preparing spot corrosion in metal surface |
-
2003
- 2003-08-27 CN CN 03284871 patent/CN2638063Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100510696C (en) * | 2006-12-01 | 2009-07-08 | 中国科学院海洋研究所 | Apparatus and method for researching erosion sensibility of stress in air under the condition of dynamic load |
| CN101787556B (en) * | 2009-01-23 | 2012-02-01 | 中国科学院海洋研究所 | Electrolytic cell |
| CN103792182A (en) * | 2014-02-26 | 2014-05-14 | 中国石油大学(华东) | Double-electrolytic tank for simulating under-deposit corrosion and application |
| CN108070865A (en) * | 2016-11-08 | 2018-05-25 | 中国石油天然气股份有限公司 | Data acquisition method and device |
| CN107228820A (en) * | 2017-06-14 | 2017-10-03 | 华电电力科学研究院 | Simulation test device and method of a kind of oxide skin dissolution to parent metal material |
| CN108362540A (en) * | 2018-03-30 | 2018-08-03 | 中国工程物理研究院流体物理研究所 | A method of preparing spot corrosion in metal surface |
| CN108362540B (en) * | 2018-03-30 | 2020-06-05 | 中国工程物理研究院流体物理研究所 | Method for preparing pitting corrosion on metal surface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |