Working electrode for implementing electro-chemical test of high-temperature high-pressure water solution system

Abstract

The invention relates to a working electrode for realizing the electrochemical test of high temperature high pressure water solution system and a preparation technology thereof, belonging to the electrochemical test field of high temperature high pressure water solution. The working electrode is composed of a core component and a sealing component, wherein the insulation unit of the core component is composed of a high temperature part and a low temperature part; the high temperature part is made from corundum tube and is penetrated by a working electrode wire, and the port of the high temperature is sealed with the working electrode wire via high temperature glue; the low temperature part is made from polytetrafluoroethylene tube and is penetrated by a working electrode wire, the port of the low temperature part is sealed with the working electrode wire via high temperature epoxy resin; the high temperature part and the low temperature part are sealed by high temperature epoxy resin; the electrode and a high pressure autoclave are sealed of high temperature and high pressure via the sealing component. The electrode prepared by the technology has high sealing performance, resists high temperature and high pressure, and can be applied in the weak acidic, neutral and weak alkaline mediums for realizing electrochemical test of filamentous metal material in high temperature high pressure water solution system at room temperature to 350 DEG C and normal temperature to 20MPa.

Description

technical field [0001] The invention relates to the field of electrochemical testing of high-temperature and high-pressure aqueous solution systems, in particular to a working electrode for realizing electrochemical testing of high-temperature and high-pressure aqueous solution systems and a preparation process thereof. Background technique [0002] Nuclear power is a clean, efficient and sustainable new energy source. The development of nuclear power is an important way to solve the shortage of power supply in our country, improve the quality of the environment, and ensure the sustainable growth of the national economy. my country's active nuclear power plants are mainly pressurized water reactors, and their key equipment, such as the main pipe of the primary circuit pressure vessel and the secondary water circuit steam generator, are used in high-temperature and high-pressure water (typical core outlet temperature is 326°C and pressure is 15.6MPa). The corrosion of materi...

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Problems solved by technology

[0003] Electrochemical testing can test the corrosion process of metal materials in an aqueous solution system in situ, but due to the harsh high-temperature and high-pressure water environment, the requirements for the preparation of experimental equipment and working electrodes are relatively high, and it is very difficult to implement. Only a few nuclear power developed countries have carried out Electrochemical Study on Corrosion of Materials in High Temperature and High Pressure Aqueous Solution

The main domestic electrochemical test systems are still aqueous solutions below 100°C, reinforced concrete and high-temperature molten salt systems, and there are few reports on high-temperature and high-pressure aqueous solutions. working electrode

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