High-temperature high-pressure in-situ high-speed scratching device

Abstract

The invention relates to a scratching device, in particular to a high-temperature high-pressure in-situ high-speed scratching device, which can be used for solving a series of problems that in-situ high speed scratching, fixation and insulation of a scratching sample, leading out of a signal line, pressure balance of a high speed motion shaft, high precision timing of a sealing and scratching process and the like are difficult to realize under a high temperature and high pressure environment in the prior art. The device is provided with a high pressure kettle, a circular heater, a manual / hydraulic bi-column fixing bracket, a control box, the high speed motion shaft, a scratching head, a sample fixing device, an air cylinder, a reversing valve, magnetic steel, a Hall sensor and a precise timer and the like. With the adoption of the device, the surface of a metal sample in the high temperature and high pressure environment is subjected to an in-situ high speed scratching research, and time consumed in the high speed scratching process is precisely recorded. Furthermore, a signal of a process of a surface film of the sample which is damaged and further passivated in the scratching process can be detected through a high-temperature high-pressure reference electrode of a kettle cover installed on the high-pressure kettle, high temperature and high pressure operation, and coordination of an auxiliary electrode and an electrochemical workstation.

Description

technical field [0001] The invention relates to a technology for scratching the surface of corrosion-resistant materials, in particular to a high-temperature, high-pressure, in-situ, high-speed scratching device. 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 a fresh surface due to mechanical damage, the corrosion of the fresh surface will be aggravated, thereby forming a new passivation film at this position , and the occurrence of repassivation depends on the combined effect of the material itself and environmental factors. Therefore, the in-situ characterization of the repassivation ability of metallic materials in a specific environment plays an important role in evaluating the corrosion resistance of materials under working conditions. [0003] At present, the characterization of the repassivation ab...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature and high-pressure in-situ high-speed scratching device to solve the problem of in-situ high-speed scratching, fixation of scratched samples, insulation, lead-out of signal lines, and high-speed movement in the high-temperature and high-pressure environment in the prior art. Shaft pressure balance and sealing issues

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