High-temperature high-pressure in-situ multichannel rapid scratch electrode system

Abstract

The invention relates to a scratch electrode system, particularly discloses a high-temperature high-pressure in-situ multichannel rapid scratch electrode system, solving the problems of difficulty in realizing in-situ multichannel rapid scratch, fixing scratch samples, insulation, precision translocation of the scratching head, extraction of signal lines, rapid motion axes, pressure balance between the interior and the exterior of an autoclave, sealing, high-precision timing of the scratch process, etc. in high temperature high pressure environments in the prior art. The system comprises a high temperature high pressure work electrode, a high temperature high pressure auxiliary electrode, a high temperature high pressure reference electrode, up and dowm autoclave covers, an autoclave body, a high speed motion axes, a scratching head, an annular heater, etc., can realize the in-situ rapid scratch research on the surface of a metal sample in high temperature high pressure environments and accurately record the time used in the rapid scratch process, and signals of the process of damage to passivation of surface film of the sample in the scratch process can be detected by combining the three high temperature high pressure electrodes arranged on the autoclave covers with an electrochemistry work station.

Description

technical field [0001] The invention relates to a technique for measuring kinetic parameters of repassivation on the surface of corrosion-resistant materials, in particular to a high-temperature and high-pressure in-situ multi-channel rapid scratch electrode system. Background technique [0002] Corrosion-resistant alloys that rely on the formation of a dense passivation film on the surface and have corrosion resistance. When the passivation film on the local surface is exposed to the fresh surface due to mechanical damage, it will intensify the corrosion on the fresh surface, thereby forming a new passivation at this position. film, and the occurrence of repassivation depends on the combined effect of the material itself and environmental factors. The stress corrosion susceptibility of materials is generally evaluated by constant load test, constant strain test and slow strain rate tensile test. These stress corrosion susceptibility evaluation methods depend on loading con...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature and high-pressure in-situ multi-channel rapid scratching electrode system, which solves the problem of in-situ multi-channel rapid scratching in the high temperature and high pressure environment, and fixes, insulates and scratches the scratched sample. A series of issues such as precise indexing, lead-out of signal lines, pressure balance of fast-moving axes, high-precision timing of sealing and scratching processes, etc.

Images