CN109470753B - Electrochemical working electrode preparation device for evaluating corrosion inhibition performance of metal coating - Google Patents
Electrochemical working electrode preparation device for evaluating corrosion inhibition performance of metal coating Download PDFInfo
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Abstract
The invention provides an electrochemical working electrode preparation device for evaluating corrosion inhibition performance of a metal coating, which is characterized by comprising the following steps: the device mainly comprises: the device comprises a transparent PVC plastic plate, a metal coating sample, a rubber sealing ring, a circular shoulder, a transparent PVC electrolytic tank, a slender glass tube, a positioning disc, a shoulder port and a supporting disc; the metal coating sample comprises a blank surface and a coating surface, wherein the blank surface is used for being connected with an electrochemical workstation, and the coating surface is divided into a plurality of same areas and is respectively used for material characterization and evaluation such as electrochemical polarization test, impedance spectrum test and the like; the transparent PVC plastic plate is used for fixing the metal coating sample; the supporting disc on the transparent PVC electrolytic cell is provided with a circular shoulder for fixing and positioning the slender glass tube and a small hole for leading out the counter electrode; the elongated glass tube is fixed in the center of the elongated glass tube through the positioning disc and the circular ring shoulder, and the reference electrode is ensured to be always kept at the optimal and same distance from the metal coating sample. The invention is suitable for the technical field of electrochemical measurement and material characterization.
Description
Technical Field
The invention relates to the technical field of electrochemical corrosion measurement and material characterization, in particular to a device for preparing an electrochemical working electrode for evaluating corrosion inhibition performance of a metal coating.
Background
The electrochemical research and measurement comprises common electrochemical polarization, cyclic voltammetry, alternating current impedance, electrochemical noise which is raised at present and the like. The electrochemical method can accurately measure the charge transfer in the electrochemical reaction process, and is widely applied to different fields of coating corrosion inhibition performance evaluation, corrosion monitoring, material characterization and the like at present. The most common electrochemical corrosion test is a three-electrode system, which is composed of a counter electrode (also called an auxiliary electrode), a reference electrode and a working electrode, and in the electrochemical research and determination, the reaction process occurring on the surface of the working electrode is mainly researched. When the corrosion inhibition performance of the metal coating is evaluated by an electrochemical method, after an electrochemical polarization test, the surface of the metal coating serving as a working electrode is damaged to a certain extent, so that the coating on the metal surface is incomplete, and the result deviation is large if an alternating current impedance spectrum test is directly carried out. Therefore, in the process of evaluating the corrosion inhibition performance of the metal coating, the preparation device and the preparation method of the working electrode have irreplaceable positions in the electrochemical field.
The working electrode packaging materials used at present mainly include two major types of inorganic and organic polymer materials, wherein the organic polymer materials are most commonly used. The organic polymer materials used in the electrochemical working electrode packaging are mainly the following: polytetrafluoroethylene, polytrifluoroethylene, polyaryletherketone, epoxy resin and the like.
Polytetrafluoroethylene and polytrifluoroethylene are not only chemically stable and electrically insulating, but are also not acted upon by almost all strong acids, strong bases, strong oxidants and organic solvents. In addition, the polytetrafluoroethylene can be used at a high temperature of 250-260 ℃ for a long time, the polytrifluoroethylene has a wide use temperature of-50-130 ℃, and the metal has good cohesiveness and is transparent. However, both the two materials are not easy to melt, process and form, and are difficult to process, which easily causes leakage of the encapsulated electrode and leads to scrapping of the electrode, and meanwhile, the hydrophobic polytetrafluoroethylene encapsulating material is easy to have bubbles attached to the surface of the electrode in aqueous solution measurement, which leads to incapability of electrochemical measurement; polytrifluoroethylene is poor in organic solvent resistance and is not suitable for electrochemical measurement of an organic phase.
The polyaryletherketone is a series of special engineering plastics with excellent performance, has excellent friction resistance, flame retardance, hydrolysis resistance and radiation resistance, good stability and easy processing and forming, and can still effectively retain the insulativity under the working conditions of high temperature, high pressure, high humidity and the like; however, the resin is used as a thermoplastic material, and needs a higher temperature when being melted, and the melted resin has a higher viscosity, so that air bubbles are easily wrapped around an electrode substrate, the electrode cannot normally work, and the raw material is expensive;
epoxy resins are often used in the encapsulation of electrochemical working electrodes due to their good processability and high cost performance. However, the cured material is brittle, and has low cracking resistance, low impact resistance and poor heat resistance, so that the application of the cured material is limited to a certain extent. More importantly, after the electrochemical test is completed, if a Scanning Electron Microscope (SEM) is used to observe the corrosion morphology of the sample or an energy spectrum analysis (EDS) is used to study the corrosion product components, the epoxy resin layer, the solder, the metal flexible lead and the like outside the electrode need to be removed to be stably placed and tested, and the operation causes the structure of the electrode to be damaged, so that the electrode cannot be used continuously, and the utilization rate of the electrode is low. If an electrode is manufactured again and an electrochemical test is carried out, the workload and the cost for manufacturing the electrode are increased, the difference of materials in different batches, the error of the manufacturing process and the change of the test environment can cause larger deviation of the test and the test result, and the working efficiency is greatly reduced.
Therefore, in order to improve the multiple utilization rate and the electrochemical test working efficiency of the working electrode and reduce the workload, the cost and the test deviation caused by the preparation of the working electrode, the invention provides the electrochemical working electrode preparation device for evaluating the corrosion inhibition performance of the metal coating, and the electrochemical working electrode for evaluating the corrosion inhibition performance of the metal coating can be simply and quickly prepared without adopting any organic high polymer material (such as epoxy resin, polytetrafluoroethylene and the like).
Disclosure of Invention
The invention aims to provide an electrochemical working electrode preparation device for evaluating corrosion inhibition performance of a metal coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an electrochemical working electrode preparation device for evaluating corrosion inhibition performance of a metal coating, which is characterized by mainly comprising the following steps: the device comprises a sample groove, a transparent PVC plastic plate, a metal coating sample, a transparent PVC electrolytic tank, a rubber sealing ring, a bolt, a supporting disc, a long and thin glass tube, a reference electrode, a counter electrode, a positioning disc, a circular shoulder, a shoulder port and an insulated wire. The metal coating sample comprises a blank surface and a coating surface, the blank surface is used for connecting an insulated wire and an electrochemical workstation, the coating surface is divided into a plurality of same areas, the number of the same areas can be specifically set according to an experimental scheme, and the metal coating sample can be respectively used for material characterization and evaluation such as electrochemical polarization test, impedance spectroscopy test and the like of the metal coating under different conditions; the transparent PVC plastic plate comprises a sample groove and a threaded hole for connection, and is mainly used for fixing a metal coating sample; the transparent PVC electrolytic cell mainly comprises a straight line segment, an arc segment, a shoulder port, a supporting disc and a threaded hole for connection, wherein the shoulder port has a certain area and is used as an actual working surface of a metal coating sample, and the supporting disc is provided with a circular shoulder for fixing and positioning a slender glass tube and a small hole for leading out a counter electrode; the rubber sealing ring positioned at the port of the shoulder is mainly used for sealing the metal coating sample; the bolt is mainly used for fixing the metal coating sample on the shoulder port of the transparent PVC electrolytic cell; the slender glass tube comprises an upper straight line section, a conical section, a lower port and a positioning disc, wherein the lower port is used for fixing a counter electrode, and the positioning disc is fixed in the center of the slender glass tube through a circular shoulder, so that the reference electrode in the slender glass tube is always kept at the optimal and same distance with the metal coating sample; the reference electrode is located in the center of the elongated glass tube and is in intimate contact with the tapered section of the elongated glass tube, contacting the test solution by capillary effect.
The invention has the advantages that:
(1) the device can simply and quickly prepare the electrochemical working electrode for evaluating the corrosion inhibition performance of the metal coating without adopting any organic and inorganic high polymer materials (such as epoxy resin, polytetrafluoroethylene and the like), and can simultaneously carry out electrochemical polarization test, impedance spectrum test, analysis of the surface appearance and chemical components of the tested coating and the like under different conditions;
(2) after electrochemical test is finished, the corrosion morphology of a sample can be directly observed by a Scanning Electron Microscope (SEM), or the components of a corrosion product can be researched by energy spectrum analysis (EDS), and an epoxy resin layer, soldering tin, a metal flexible lead and the like outside an electrode do not need to be removed;
(3) the structure of the device and the electrode preparation method are simple, the rapid preparation of the electrode can be realized, the optimal and same distance between the reference electrode and the working electrode can be always kept, and the prepared working electrode can be ensured to have a consistent shape, so that the preparation efficiency and the utilization rate of the working electrode are improved, and the accuracy of the metal coating corrosion inhibition performance evaluation test result is improved to the maximum extent.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic top view of the structure of the metal coating sample and the transparent PVC plastic plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 and fig. 2, the device for preparing an electrochemical working electrode for evaluating corrosion inhibition performance of a metal coating is characterized by mainly comprising: the device comprises a sample groove 2, a transparent PVC plastic plate 3, a metal coating sample 4, a transparent PVC electrolytic tank 8, a rubber sealing ring 5, a bolt 6, a supporting disc 18, a slender glass tube 10, a reference electrode 9, a counter electrode 11, a positioning disc 15, an annular shoulder 7, a shoulder port 16 and an insulated lead 23. The metal coating sample 4 comprises a blank surface 21 and a coating surface 22, wherein the blank surface 21 is used for connecting an insulated wire 23 and an electrochemical workstation, the coating surface 22 is divided into a plurality of same areas, the number of the same areas can be specifically set according to an experimental scheme, and the same areas can be respectively used for material characterization and evaluation such as electrochemical polarization test and impedance spectroscopy test of the metal coating under different conditions; the transparent PVC plastic plate 3 comprises a sample groove 2 and a threaded hole 1 for connection, and is mainly used for fixing a metal coating sample 4; the transparent PVC electrolytic cell 8 mainly comprises a straight line segment 12, an arc segment 14, a shoulder port 16, a supporting disc 18 and a threaded hole 1 for connection, wherein the shoulder port 16 has a certain area and is used as an actual working surface of the metal coating sample 4, and the supporting disc 18 is provided with an annular shoulder 7 for fixing and positioning the slender glass tube 10 and a small hole 13 for leading out the counter electrode 11; the rubber sealing ring 5 positioned at the shoulder port 16 is mainly used for sealing the metal coating sample 4; the bolt 6 is mainly used for fixing the metal coating sample 4 on a shoulder port 16 of the transparent PVC electrolytic cell 8; the elongated glass tube 10 comprises an upper straight line segment 20, a conical segment 19, a lower port 17 and a positioning disc 15, wherein the lower port 17 is used for fixing the counter electrode 11, and the positioning disc 15 is fixed in the center of the elongated glass tube 10 through an annular shoulder 7, so that the reference electrode 9 in the elongated glass tube 10 is always kept at the optimal and same distance from the metal coating sample 4; the reference electrode 9 is centrally located in the elongated glass tube 10 and is in intimate contact with the tapered section 19 of the elongated glass tube 10 and contacts the test solution by capillary effect.
Claims (1)
1. An electrochemical working electrode preparation device for evaluating corrosion inhibition performance of a metal coating is characterized by mainly comprising: the device comprises a sample groove (2), a transparent PVC plastic plate (3), a metal coating sample (4), a rubber sealing ring (5), a bolt (6), a circular shoulder (7), a transparent PVC electrolytic tank (8), a thin and long glass tube (10), a positioning disc (15), a shoulder port (16) and a supporting disc (18); the metal coating sample (4) comprises a blank surface (21) and a coating surface (22), the blank surface (21) is used for connecting an insulated wire (23) and an electrochemical workstation, the coating surface (22) is divided into a plurality of same areas, the number of the same areas can be specifically set according to an experimental scheme, and the same areas can be respectively used for electrochemical polarization test and impedance spectroscopy test of the metal coating under different conditions; the transparent PVC plastic plate (3) comprises a sample groove (2) and a threaded hole (1) for connection, and is mainly used for fixing a metal coating sample (4); the transparent PVC electrolytic cell (8) mainly comprises a straight line section (12), an arc section (14), a shoulder port (16), a supporting disc (18) and a threaded hole (1) for connection, wherein the shoulder port (16) has a certain area and is used as an actual working surface of a metal coating sample (4), and the supporting disc (18) is provided with an annular shoulder (7) for fixing and positioning the slender glass tube (10) and a small hole (13) for leading out the counter electrode (11); the rubber sealing ring (5) positioned at the shoulder port (16) is mainly used for sealing the metal coating sample (4); the bolt (6) is mainly used for fixing the metal coating sample (4) on a shoulder port (16) of the transparent PVC electrolytic cell (8); the elongated glass tube (10) comprises an upper straight line section (20), a conical section (19), a lower port (17) and a positioning disc (15), wherein the lower port (17) is used for fixing a counter electrode (11), and the positioning disc (15) is fixed in the center of the elongated glass tube (10) through a circular shoulder (7), so that the reference electrode (9) in the elongated glass tube (10) is always kept at the optimal and same distance from the metal coating sample (4); the reference electrode (9) is positioned in the center of the elongated glass tube (10), is in close contact with the tapered section (19) of the elongated glass tube (10), and is in contact with the test solution through a capillary effect.
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| CN110646338B (en) * | 2019-09-24 | 2022-05-17 | 广西大学 | External corrosion electrochemical test device of sample |
| CN111443124A (en) * | 2020-04-24 | 2020-07-24 | 常州大学 | Experimental device for stray current corrosion simulation and near-surface micro-area pH measurement |
| CN114609206B (en) * | 2022-03-21 | 2023-08-11 | 中山大学 | Electrochemical testing method of abradable seal coating system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910830A (en) * | 1974-04-08 | 1975-10-07 | Petrolite Corp | Flush mounted probe assembly |
| JP2008261711A (en) * | 2007-04-11 | 2008-10-30 | Toyota Motor Corp | Electrochemical measuring device |
| CN102937616A (en) * | 2011-12-27 | 2013-02-20 | 北京化工大学 | Electrolytic cell with controllable temperature used for electrochemical measurement |
| CN103149254A (en) * | 2013-02-25 | 2013-06-12 | 天津大学 | Surface coating performance testing device and evaluation method for timber, concrete or other materials |
| CN205374365U (en) * | 2015-12-25 | 2016-07-06 | 江苏省沙钢钢铁研究院有限公司 | Electrolytic tank device |
| CN105758906A (en) * | 2016-04-18 | 2016-07-13 | 青岛科技大学 | Electrochemical testing device |
| CN207051235U (en) * | 2017-08-18 | 2018-02-27 | 辽宁工业大学 | A kind of use for laboratory electrochemical corrosion measurement electrolytic cell |
-
2018
- 2018-10-28 CN CN201811263268.9A patent/CN109470753B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910830A (en) * | 1974-04-08 | 1975-10-07 | Petrolite Corp | Flush mounted probe assembly |
| JP2008261711A (en) * | 2007-04-11 | 2008-10-30 | Toyota Motor Corp | Electrochemical measuring device |
| CN102937616A (en) * | 2011-12-27 | 2013-02-20 | 北京化工大学 | Electrolytic cell with controllable temperature used for electrochemical measurement |
| CN103149254A (en) * | 2013-02-25 | 2013-06-12 | 天津大学 | Surface coating performance testing device and evaluation method for timber, concrete or other materials |
| CN205374365U (en) * | 2015-12-25 | 2016-07-06 | 江苏省沙钢钢铁研究院有限公司 | Electrolytic tank device |
| CN105758906A (en) * | 2016-04-18 | 2016-07-13 | 青岛科技大学 | Electrochemical testing device |
| CN207051235U (en) * | 2017-08-18 | 2018-02-27 | 辽宁工业大学 | A kind of use for laboratory electrochemical corrosion measurement electrolytic cell |
Non-Patent Citations (3)
| Title |
|---|
| Experimental and numerical investigation on repairing process of cement-casing repaired by rolling reshaper;Deng Kuanhai等;《Journal of Petroleum Science and Engineering》;20171124;第166卷;全文 * |
| 电化学测量技术在锅炉化学清洗中的工业应用;张秀丽等;《中国电力》;20110305;第44卷(第3期);全文 * |
| 防己和延胡索提取物对J55钢的缓蚀作用研究;陈松松;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20180115(第01期);全文 * |
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