CN110132834B - Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method - Google Patents
Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method Download PDFInfo
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- CN110132834B CN110132834B CN201910460635.2A CN201910460635A CN110132834B CN 110132834 B CN110132834 B CN 110132834B CN 201910460635 A CN201910460635 A CN 201910460635A CN 110132834 B CN110132834 B CN 110132834B
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000005260 corrosion Methods 0.000 title claims abstract description 23
- 230000007797 corrosion Effects 0.000 title claims abstract description 23
- 238000011160 research Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000000126 substance Substances 0.000 title claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 12
- 230000010287 polarization Effects 0.000 claims description 5
- 230000005518 electrochemistry Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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Abstract
The high temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system comprises a test cavity, wherein an inlet and an outlet of the test cavity are connected with a pipeline capable of circulating high temperature and high pressure medium in a welding mode; the test electrode is embedded into the cylindrical electrode sealing sleeve in an interference fit mode, and then the electrode sealing sleeve is embedded into a hole in the gland; the lead post is coated by the polytetrafluoroethylene heat-shrinkable sleeve, passes through the inner hole of the gland and is electrically connected with the test electrode through threads; penetrating a compression sealing element from an inner hole of a gland, penetrating a wire rod from the inner hole of the compression sealing element, and connecting the compression sealing element with an electrode sealing sleeve through threads; the compression nut is connected with the compression bolt on the outer wall of the gland through threads, and the medium in the cavity is tested to be sealed with the gland and the wire column through extrusion of the compression sealing piece. According to the electrode form, the electrochemical testing method is determined; the device can simulate the environment of 90-degree medium impact condition and conduct corrosion electrochemical research in the simulated environment.
Description
Technical Field
The invention relates to the technical field of corrosion test research devices, in particular to a high-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system and a testing method.
Background
The inlet temperature of the high-temperature gas cooled reactor steam generator is 200-205 ℃, and the inlet material of the steam generator is positioned in a sensitive temperature range of flow acceleration corrosion. If the dynamic water chemical corrosion is improperly controlled, the service life of the steam generator is reduced, and the safe operation of the high-temperature gas cooled reactor is threatened. Corrosion electrochemistry is a reliable method of assessing material corrosion problems. At present, the test research on the dynamic water chemistry corrosion problem of the high-temperature gas cooled reactor two-loop steam generator is lack of test equipment for realizing high-temperature, high-pressure and high-flow-rate environments, and the electrode system design matched with the corrosion electrochemical research method is yet to be developed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an electrode system and a testing method for electrochemical research of high-temperature gas cooled reactor secondary loop water chemical corrosion, which have the characteristic of being capable of carrying out flow velocity accelerated corrosion research under dynamic conditions.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a high temperature gas cooled reactor second circuit water chemistry corruption electrochemistry research electrode system, includes test chamber 8 and test electrode 7, and the exit of test chamber 8 is connected with the pipeline that can circulate high temperature, high pressure, high velocity of flow medium through the welding mode, and test electrode 7 sets up in electrode seal cover 6, and electrode seal cover 6 imbeds in gland 5 that have the hole, and gland 5 hole penetrates gland seal 3, and gland seal 3 is provided with the hole, passes wire post 1 in gland 5 hole and the gland seal 3 hole and links to each other with test electrode 7, wire post 1 outside parcel have polytetrafluoroethylene pyrocondensation sleeve, gland seal 3's hole and gland 5 hole are on same horizontal line, gland seal 3 is connected with electrode seal cover 6 through the screw thread, gland seal 3 non-connecting end is provided with the gland bolt 4 and the gland nut 2 that are used for its extruded gland outer wall.
The test electrode 7 is embedded into the electrode sealing sleeve 6 in an interference fit mode, and the electrode sealing sleeve 6 is made of cylindrical polytetrafluoroethylene.
The wire pole 1 is connected with the test electrode 7 through threads.
The compressing sealing piece 3 is made of polytetrafluoroethylene.
The compression bolt 4 is connected with the compression nut 2 through threads.
The test method of the high temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system comprises the steps of arranging 2 test electrodes 7 in parallel, adjusting the conditions of temperature, flow rate, pressure and the like of a medium in a test cavity 8 after the test electrodes 7 are installed, measuring the resistance of a solution by adopting an electrochemical impedance method, measuring the resistance value between the two electrodes by adopting a linear polarization method, and subtracting the resistance value of the solution to obtain the resistance value of the surface film layers of the two electrodes.
The invention has the beneficial effects that:
compared with the prior art, the invention can simulate the flow accelerated corrosion test research under the conditions of high temperature, high pressure and high flow rate, and adopts the combination of an electrochemical impedance method and a linear polarization method to realize the measurement of the electrode surface film layer.
According to the electrode form, the electrochemical testing method is determined; the device can simulate the environment of 90-degree medium impact condition and conduct corrosion electrochemical research in the simulated environment.
Drawings
Fig. 1 is a front view of the structure of the device of the present invention.
FIG. 2 is a side view of the structure of the device of the present invention
Fig. 3 is a top view of the structure of the device of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1: the inlet and outlet of the test cavity 8 are connected with a pipeline capable of circulating high-temperature, high-pressure and high-flow-rate medium in a welding mode so as to realize a high-temperature, high-pressure and high-flow-rate medium environment in the cavity; the test electrode 7 is embedded into the cylindrical polytetrafluoroethylene electrode sealing sleeve 6 in an interference fit mode, and then the electrode sealing sleeve 6 is embedded into a hole in the gland 5; the lead post 1 is coated by a polytetrafluoroethylene heat-shrinkable sleeve, passes through the inner hole of the gland 5 and is connected with the test electrode 7 through threads; penetrating a polytetrafluoroethylene compression sealing element 3 from an inner hole of a gland 5, penetrating a lead column 1 from the inner hole of the compression sealing element 3, and connecting the compression sealing element 3 with an electrode sealing sleeve 6 through threads; the compression nut 2 is connected with the compression bolt 4 on the outer wall of the gland through threads, and the medium in the test cavity 8 is sealed with the gland 5 and the wire column 1 through extrusion of the compression sealing piece 3.
As shown in fig. 2 and 3: according to the high-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system and the testing method, 2 electrodes are tested, after the electrodes are installed, conditions such as temperature, flow rate and pressure of a medium in the testing cavity 8 are adjusted, an electrochemical impedance method is adopted to measure the resistance of a solution, then a linear polarization method is adopted to measure the resistance between the two electrodes, and the resistance of the surface film layers of the two electrodes is obtained after subtracting the resistance of the solution.
Claims (6)
1. The utility model provides a high temperature gas cooled reactor second circuit water chemistry corruption electrochemistry research electrode system, which is characterized by, including test chamber (8) and test electrode (7), the exit of test chamber (8) is connected with the pipeline that can circulate high temperature, high pressure, high velocity medium through the welding mode, test electrode (7) set up in electrode seal cover (6), electrode seal cover (6) are embedded into gland (5) with the hole, gland (5) hole penetrates gland seal (3), gland seal (3) are provided with the hole, gland (5) hole and gland seal (3) hole in pass through wire post (1) and link to each other with test electrode (7), wire post (1) outside parcel have polytetrafluoroethylene pyrocondensation sleeve, gland seal (3) hole and gland (5) hole are on same horizontal line, gland seal (3) are connected with electrode seal cover (6) through the screw thread, gland seal (3) non-connecting end is provided with gland bolt (4) and gland nut (2) that are used for the outer wall of its extrusion;
and measuring the solution resistance by adopting an electrochemical impedance method, measuring the resistance value between the two electrodes by adopting a linear polarization method, and subtracting the solution resistance value to obtain the resistance value of the surface film layers of the two electrodes.
2. The electrochemical research electrode system for the two-circuit water chemical corrosion of the high-temperature gas cooled reactor according to claim 1, wherein the test electrode (7) is embedded into the electrode sealing sleeve (6) in an interference fit mode, and the electrode sealing sleeve (6) is made of cylindrical polytetrafluoroethylene.
3. The high-temperature gas cooled reactor secondary loop water chemistry corrosion electrochemical research electrode system according to claim 1, wherein the wire column (1) is connected with the test electrode (7) through threads.
4. The electrochemical research electrode system for the two-circuit water chemical corrosion of the high-temperature gas cooled reactor according to claim 1, wherein the compression sealing piece (3) is made of polytetrafluoroethylene.
5. The high-temperature gas cooled reactor secondary loop water chemical corrosion electrochemical research electrode system according to claim 1, wherein the compression bolt (4) and the compression nut (2) are connected through threads.
6. A testing method of a high-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system is characterized in that 2 testing electrodes (7) are arranged in parallel, after the testing electrodes (7) are installed, the temperature, the flow speed and the pressure conditions of a medium in a testing cavity (8) are adjusted, an electrochemical impedance method is adopted to measure the resistance of a solution, then a linear polarization method is adopted to measure the resistance value between the two electrodes, and the resistance value of the surface film layers of the two electrodes is obtained after subtracting the resistance of the solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460635.2A CN110132834B (en) | 2019-05-30 | 2019-05-30 | Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460635.2A CN110132834B (en) | 2019-05-30 | 2019-05-30 | Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method |
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| Publication Number | Publication Date |
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| CN110132834A CN110132834A (en) | 2019-08-16 |
| CN110132834B true CN110132834B (en) | 2024-03-26 |
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| CN201910460635.2A Active CN110132834B (en) | 2019-05-30 | 2019-05-30 | Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method |
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| CN111766194B (en) * | 2020-07-15 | 2022-03-01 | 中国核动力研究设计院 | Lead penetration piece for high-temperature and high-pressure electrochemical corrosion experiment and assembling method thereof |
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| WO1994012862A1 (en) * | 1992-11-20 | 1994-06-09 | Westinghouse Electric Corporation | Apparatus and method for real time corrosion monitoring in high temperature systems |
| CN101520402A (en) * | 2009-02-24 | 2009-09-02 | 上海大学 | Experimental facility for testing electrochemical signals of various materials in high-temperature high-pressure environment |
| CN101900664A (en) * | 2010-08-04 | 2010-12-01 | 南京工业大学 | Vapour-liquid two-phase flow accelerated corrosion test device |
| CN102121896A (en) * | 2010-05-28 | 2011-07-13 | 中国海洋石油总公司 | Experimental device for jet etching simulation and electrochemical test of high-temperature high-pressure loop |
| 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 |
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| CN210894044U (en) * | 2019-05-30 | 2020-06-30 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system |
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2019
- 2019-05-30 CN CN201910460635.2A patent/CN110132834B/en active Active
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|---|---|---|---|---|
| WO1994012862A1 (en) * | 1992-11-20 | 1994-06-09 | Westinghouse Electric Corporation | Apparatus and method for real time corrosion monitoring in high temperature systems |
| CN101520402A (en) * | 2009-02-24 | 2009-09-02 | 上海大学 | Experimental facility for testing electrochemical signals of various materials in high-temperature high-pressure environment |
| CN102121896A (en) * | 2010-05-28 | 2011-07-13 | 中国海洋石油总公司 | Experimental device for jet etching simulation and electrochemical test of high-temperature high-pressure loop |
| CN101900664A (en) * | 2010-08-04 | 2010-12-01 | 南京工业大学 | Vapour-liquid two-phase flow accelerated corrosion test device |
| 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 |
| CN109078931A (en) * | 2018-08-03 | 2018-12-25 | 西安热工研究院有限公司 | The dynamic simulation tester and application method of high temperature gas cooled reactor nuclear power unit secondary circuit chemical cleaning |
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