Working electrode for achieving electrochemical test in high-temperature and high-pressure water

Abstract

The invention discloses a working electrode for achieving electrochemical testing in high-temperature and high-pressure water, which is characterized in that during testing, a to-be-tested sample is placed in a high-temperature and high-pressure kettle, and one end of an electrode lead is connected with the to-be-tested sample; the other end of the electrode lead sequentially penetrates through the body, the sealing sleeve, the conical sealing ring I, the clamping ring, the conical sealing ring II and the upper end cap and then is connected with an electrochemical workstation located outside the high-temperature and high-pressure container;the sealing of the electrode wire is rachieving by screwing down the compression nut to extrude the biconical sealing ring; the cooling device is further arranged outside the body, so that the electrode lead and the sealing piece are sealed at a low temperature, the sealing difficulty is greatly reduced, and the sealing reliability is improved. The electrode is easy to manufacture, high in reliability, good in sealing performance, convenient to install and capable of achieving electrochemical testing of metal materials in a high-temperature and high-pressure water system with the temperature ranging from the room temperature to 350 DEG C and the pressure ranging from the normal pressure to 22 MPa.

Description

technical field [0001] The invention relates to the field of electrochemical testing in high-temperature and high-pressure water systems, in particular to a working electrode for realizing electrochemical testing in high-temperature and high-pressure water. Background technique [0002] Some key metal components of thermal power plants and nuclear power plants have been in high temperature and high pressure water for a long time. The corrosion resistance and deterioration degree of materials in special environments are very important. High temperature and high pressure electrochemical measurement technology is to evaluate the corrosion resistance, corrosion behavior and aging mechanism of materials one of the important means. Compared with electrochemical testing technology at room temperature, electrochemical measurement under high temperature and high pressure conditions is more difficult, mainly because it is more difficult to achieve the sealing of electrodes and high te...

AI Technical Summary

Problems solved by technology

Compared with the electrochemical test technology at room temperature, electrochemical measurement under high temperature and high pressure conditions is more difficult, mainly because it is difficult to achieve the sealing of electrodes and high temperature and high pressure devices.

At present, domestic scientific research institutes generally use electrodes provided by Toshin Corporation of Japan or CORTEST Corporation of the United States for related tests, and the electrodes are relatively expensive.

At present, there are some domestic reports on electrochemical measuring equipment or electrodes under high temperature and high pressure conditions, but many patents use polytetrafluoroethylene as the sealing material without a cooling device. The poor elasticity of polytetrafluoroethylene not only has poor sealing effect, but also It is difficult to perform long-term stability tests (see patent CN 201910460646.0), which will lead to high-temperature and high-pressure water leakage and accidents

In addition, most patents for high-temperature and high-pressure electrochemical testing equipment only provide schematic diagrams of the principle (CN201910376671.0 and CN201510044673.1), and the structure and sealing method of key positions of the equipment are not given, which is the significance of guiding actual production and processing not very big

Images