Experimental facility for testing electrochemical signals of various materials in high-temperature high-pressure environment

Abstract

The invention discloses an experimental facility for testing electrochemical signals of various materials in a high-temperature high-pressure environment, which comprises a high-pressure kettle, an electrode system, a temperature controller, an external electrochemical tester and a circulating water cooling system, wherein the outer side of the high-pressure kettle is provided with a heating electric stove wire, and the outer surface of the high-pressure kettle is provided with an asbestos thermal insulation layer; a kettle cover is provided with a heat dispersion rod, an air relief valve, a pressure meter, a safe rupture disk, and a thermocouple; the electrode system on the kettle cover consists of a working electrode, a reference electrode and an auxiliary electrode, and can perform corrosion electrochemical signal test on three samples simultaneously; and the output of electrochemical signals on the surfaces of the samples under a condition of a high-temperature high-pressure water environment is achieved. The experimental facility can conveniently simulate the practical working conditions of a first loop and a second loop of a nuclear power plant and test the electrochemical signals in the corrosion process of various samples simultaneously, and can research corrosion actions and mechanisms of various materials simultaneously in a high-temperature high-pressure environment; besides, the experimental facility has the advantages of compact structure, safety and reliability and convenient operation, and can improve the testing efficiency.

Description

technical field [0001] The invention relates to a device for testing the corrosion resistance of metal materials by an electrochemical method, in particular to a device for testing electrochemical signals of nuclear power materials under static conditions to simulate corrosion in a high-temperature and high-pressure environment. Background technique [0002] Under high temperature and high pressure environment, the corrosion of materials will be intensified, and the degree of corrosion will directly affect the normal operation of nuclear power plants. In order to grasp the degree and cause of material corrosion damage and take corresponding preventive measures, it is necessary to conduct experimental analysis and research on its corrosion resistance. Static autoclave is a commonly used device for nuclear power material corrosion test under the condition of simulating high temperature and high pressure of nuclear power plant. A high temperature and high pressure working cond...

AI Technical Summary

Problems solved by technology

However, due to high temperature and high pressure conditions, there are high requirements on the structure of the sample electrode and reference electrode, it is not easy to realize the output and measurement of electrochemical signals. Electrochemical signals, such as polarization curves and electrochemical impedance spectroscopy, etc., these tests can not give the corrosion process behavior of the material in the actual situation

The existing high-temperature and high-pressure electrochemical test system can only test a single sample, which has low efficiency, and it is difficult to simulate the simultaneous corrosion process of multiple materials in the high-temperature and high-pressure working environment of the primary and secondary circuits of nuclear power plants, which affects the corrosion behavior of nuclear power materials. in-depth study of the mechanism

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