High-temperature gas-cooled reactor secondary circuit dynamic hydrochemistry corrosion and electrochemistry research electrode system and testing method

Abstract

The invention discloses a high-temperature gas-cooled reactor secondary circuit dynamic hydrochemistry corrosion and electrochemistry research electrode system and a testing method. The system comprises a testing cavity, wherein an inlet and an outlet of the testing cavity are connected with communicated high-temperature and high-pressure medium pipelines in a welding manner; testing electrodes are embedded into cylindrical electrode sealing sleeves in an interference fit manner; the electrode sealing sleeves are embedded into holes in a gland; guide posts are coated by PTFE heat-shrinkable bushes, penetrate through the holes in the gland, and are electrically connected with the testing electrodes by screw threads; compressing sealing elements penetrate into the holes in the gland; the guide posts penetrate through inner holes of the compressing sealing elements; the compressing sealing elements are connected with the electrode sealing sleeves by screw threads; compressing nuts are connected with compressing bolts on an outer wall of the gland by screw threads; and sealing between a medium in the testing cavity and the gland and between the medium and the guide posts is tested by extruding the compressing sealing elements. An electrochemical testing method is determined according to forms of the electrodes; a device can simulate a 90-degree medium impact environment; and corrosion electrochemistry research can be performed in a simulation environment.

Description

technical field [0001] The invention relates to the technical field of corrosion test research devices, in particular to an electrode system and a test method for dynamic water chemical corrosion electrochemical research of a secondary loop of a high temperature gas-cooled reactor. Background technique [0002] The inlet temperature of the steam generator of the high-temperature gas-cooled reactor is between 200°C and 205°C, and the material of the inlet of the steam generator is in the sensitive temperature range of flow accelerated corrosion. If the dynamic water chemical corrosion is not properly controlled, the service life of the steam generator will be reduced and the safe operation of the high temperature gas-cooled reactor will be threatened. Corrosion electrochemistry is a reliable method for evaluating corrosion problems in materials. At present, the experimental research on the dynamic water chemical corrosion of the secondary loop steam generator of the high tem...

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Problems solved by technology

At present, the experimental research on the dynamic water chemical corrosion problem of the secondary loop steam generator of the high temperature gas-cooled reactor not only lacks the test equipment to realize the high temperature, high pressure and high flow rate environment, but also the electrode system design matching the corrosion electrochemical research method still needs to be developed

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