CN210894044U - High-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system - Google Patents
High-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system Download PDFInfo
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- CN210894044U CN210894044U CN201920805197.4U CN201920805197U CN210894044U CN 210894044 U CN210894044 U CN 210894044U CN 201920805197 U CN201920805197 U CN 201920805197U CN 210894044 U CN210894044 U CN 210894044U
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Abstract
The dynamic water chemical corrosion electrochemical research electrode system of the high-temperature gas cooled reactor secondary loop comprises a test cavity, wherein an inlet and an outlet of the test cavity are connected with a pipeline through which high-temperature and high-pressure media can flow in a welding mode; the testing electrode is embedded into the cylindrical electrode sealing sleeve in an interference fit mode, and the electrode sealing sleeve is embedded into a hole in the gland; the lead post is coated by a polytetrafluoroethylene heat-shrinkable sleeve, passes through an inner hole of the gland and is electrically connected with the test electrode through threads; the pressing sealing piece penetrates through an inner hole of the gland, the lead rod penetrates through an inner hole of the pressing sealing piece, and the pressing sealing piece is connected with the 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 sealing among the medium in the cavity, the gland and the lead column is tested through the extrusion of the compression sealing element. The utility model determines an electrochemical testing method according to the form of the electrode; the environment of 90-degree medium impact condition can be simulated, and corrosion electrochemistry research is carried out in the simulated environment.
Description
Technical Field
The utility model relates to a corrosion test research device technical field, in particular to two return circuits of high temperature gas cooled reactor two loop developments water chemistry corrodes electrochemistry research electrode system and test method.
Background
The temperature of the inlet of the high temperature gas cooled reactor steam generator is 200-205 ℃, and the material of the inlet of the steam generator is positioned in a flow accelerated corrosion sensitive temperature range. For example, the dynamic water chemistry corrosion is not properly controlled, the service life of a steam generator is reduced, and the safe operation of the high-temperature gas cooled reactor is threatened. Corrosion electrochemistry is a reliable method to assess the corrosion problem of materials. At present, the experimental research aiming at the problem of dynamic water chemical corrosion of a steam generator of a two-loop of a high-temperature gas cooled reactor is lack of test equipment for realizing high-temperature, high-pressure and high-flow-rate environment, and the design of an electrode system matched with a corrosion electrochemical research method is still to be developed.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a high-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system and a test method, which have the aim characteristic of carrying out the accelerated corrosion research of the flow velocity under the dynamic condition.
In order to realize the purpose, the utility model discloses a technical scheme is:
the two-loop dynamic water chemical corrosion electrochemical research electrode system of the high-temperature gas cooled reactor comprises a test cavity 8 and a test electrode 7, wherein an inlet and an outlet of the test cavity 8 are connected with a pipeline through which a high-temperature, high-pressure and high-flow-rate medium can flow in a welding mode, the test electrode 7 is arranged in an electrode sealing sleeve 6, the electrode sealing sleeve 6 is embedded into a gland 5 with an inner hole, the inner hole of the gland 5 penetrates into a compression sealing element 3, the compression sealing element 3 is provided with an inner hole, the inner holes of the gland 5 and the compression sealing element 3 penetrate through a lead post 1 to be connected with a test electrode 7, the outer side of the lead post 1 is wrapped by a polytetrafluoroethylene heat-shrinkable sleeve, an inner hole of a compression sealing element 3 and an inner hole of a gland 5 are on the same horizontal line, the compression sealing element 3 is connected with an electrode sealing sleeve 6 through threads, and the unconnected end of the compression sealing element 3 is provided with a compression bolt 4 and a compression nut 2 which are used for extruding the outer wall of the gland.
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 lead column 1 is connected with a test electrode 7 through threads.
The compression sealing element 3 is made of polytetrafluoroethylene.
The compression bolt 4 is in threaded connection with the compression nut 2.
The test method of the two-loop dynamic water chemical corrosion electrochemical research electrode system of the high-temperature gas cooled reactor comprises the steps of arranging 2 test electrodes 7 in parallel, after the test electrodes 7 are installed, adjusting the conditions of temperature, flow velocity, pressure and the like of a medium in a test cavity 8, measuring the resistance of a solution by adopting an electrochemical impedance method, measuring the resistance between the two electrodes by adopting a linear polarization method, and subtracting the resistance of the solution to obtain the resistance of surface film layers of the two electrodes.
The utility model has the advantages that:
the utility model provides a two return circuits developments water chemistry of high temperature gas cooled reactor corrodes electrochemical research electrode system, the utility model discloses compare with prior art, can simulate the high temperature high pressure high velocity of flow condition down flow accelerated corrosion test research to adopt electrochemical impedance method and linear polarization method to ally oneself with, realize electrode surface rete survey.
The utility model determines an electrochemical testing method according to the form of the electrode; the device can simulate the environment of 90-degree medium impact conditions and carry out 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 device of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1: a high-flow-rate water chemical corrosion electrochemical research electrode system of a high-temperature gas cooled reactor two-loop is characterized in that an inlet and an outlet of a test cavity 8 are connected with a pipeline through which high-temperature, high-pressure and high-flow-rate media can flow in a welding mode, so that a high-temperature, high-pressure and high-flow-rate medium environment in the cavity is realized; the testing 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 passes through an inner hole of the gland 5 after being coated by the polytetrafluoroethylene heat-shrinkable sleeve and is connected with the test electrode 7 through threads; penetrating a compression sealing element 3 made of polytetrafluoroethylene material into an inner hole of a gland 5, penetrating a lead post 1 into 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 in a threaded manner, and the compression seal 3 is extruded to seal the medium in the test cavity 8, the gland 5 and the lead column 1.
As shown in fig. 2 and fig. 3: the two-loop dynamic water chemical corrosion electrochemical research electrode system of the high-temperature gas cooled reactor comprises 2 testing electrodes, after the electrodes are installed, the solution resistance is measured by adopting an electrochemical impedance method after the conditions of temperature, flow velocity, pressure and the like of a medium in a testing cavity 8 are adjusted, then the resistance value between the two electrodes is measured by adopting a linear polarization method, and the resistance value of a surface film layer of the two electrodes is obtained after the solution resistance is subtracted.
Claims (5)
1. The dynamic water chemical corrosion electrochemical research electrode system of the high-temperature gas cooled reactor two-loop is characterized by comprising a test cavity (8) and a test electrode (7), wherein an inlet and an outlet of the test cavity (8) are connected with a pipeline through which a high-temperature, high-pressure and high-flow-rate medium can flow in a welding mode, the test electrode (7) is arranged in an electrode sealing sleeve (6), the electrode sealing sleeve (6) is embedded into a gland (5) with an inner hole, the inner hole of the gland (5) penetrates into a compression sealing member (3), the compression sealing member (3) is provided with an inner hole, the inner hole of the gland (5) and the inner hole of the compression sealing member (3) penetrate through a lead column (1) to be connected with the test electrode (7), the outer side of the lead column (1) is wrapped with a polytetrafluoroethylene heat-shrinkable sleeve, the inner hole of the compression sealing member (3) and the inner hole of the gland (5) are on the same horizontal line, the unconnected end of the compression sealing element (3) is provided with a compression bolt (4) and a compression nut (2) which are used for extruding the outer wall of the gland.
2. The high temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system as claimed in claim 1, wherein the test electrode (7) is embedded into the electrode sealing sleeve (6) in an interference fit manner, and the electrode sealing sleeve (6) is made of cylindrical polytetrafluoroethylene.
3. The high temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system as claimed in claim 1, wherein the lead column (1) is connected with the test electrode (7) through a screw thread.
4. The dynamic water chemical corrosion electrochemical research electrode system of the high temperature gas cooled reactor two-loop, according to claim 1, wherein the compression seal (3) is made of polytetrafluoroethylene.
5. The high temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system as claimed in claim 1, wherein the compression bolt (4) and the compression nut (2) are connected through a thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920805197.4U CN210894044U (en) | 2019-05-30 | 2019-05-30 | High-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system |
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| CN201920805197.4U CN210894044U (en) | 2019-05-30 | 2019-05-30 | High-temperature gas cooled reactor two-loop dynamic water chemical corrosion electrochemical research electrode system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132834A (en) * | 2019-05-30 | 2019-08-16 | 华能山东石岛湾核电有限公司 | A kind of high temperature gas cooled reactor secondary circuit Dynamic Water chemical attack electrochemical research electrode system and test method |
| CN111766194A (en) * | 2020-07-15 | 2020-10-13 | 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 |
-
2019
- 2019-05-30 CN CN201920805197.4U patent/CN210894044U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132834A (en) * | 2019-05-30 | 2019-08-16 | 华能山东石岛湾核电有限公司 | A kind of high temperature gas cooled reactor secondary circuit Dynamic Water chemical attack electrochemical research electrode system and test method |
| CN110132834B (en) * | 2019-05-30 | 2024-03-26 | 华能山东石岛湾核电有限公司 | Electrochemical research electrode system for high-temperature gas cooled reactor two-loop dynamic water chemical corrosion and testing method |
| CN111766194A (en) * | 2020-07-15 | 2020-10-13 | 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 |
| 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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