A device and method for high-throughput evaluation of crevice environment stress corrosion susceptibility

Abstract

The invention discloses a gap environment stress corrosion sensitivity high-flux evaluation device and method. The device comprises an environment kettle, a sample arranged in the environment kettle,and loading mechanisms connected with the two ends of the test sample and used for loading stress on the sample, and also comprises a clamp and a cushion block, wherein the clamp is clamped on the sample, and the cushion block is arranged between the clamp and the sample and separates the clamp from the sample; the cushion block is provided with a porous structure allowing water to flow through, the sample is provided with two opposite test planes, the clamp comprises two clamping surfaces, the two clamping surfaces clamp the test planes of the sample respectively, and test gaps with the thickness equal to that of the cushion block are formed between the clamping surfaces and the test planes. The high-flux design of the gaps and continuous gaps is adopted, the stress corrosion sensitivityunder various gap environments can be evaluated at a time, and the evaluation quality and efficiency are greatly improved.

Description

technical field [0001] The invention relates to the field of stress corrosion testing, in particular to a high-throughput evaluation device and method for realizing stress corrosion sensitivity in a crevice environment. Background technique [0002] Stress corrosion is one of the main problems threatening industrial safety production. The failure incubation period of stress corrosion cracking is long and the form is concealed. Once cracking occurs, the crack propagation period is short, which easily leads to equipment damage. Stress corrosion is inseparable from the three elements of material, stress and corrosive medium. At present, the stress corrosion test is generally carried out in accordance with the national standard GB / T 15970 "Stress Corrosion Test for Corrosion of Metals and Alloys". Because ion concentration is easy to occur in the crevice environment, crevice corrosion occurs, and the service performance of the material is accelerated. Therefore, in the crevice...

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Problems solved by technology

[0004] Although researchers have established a complete stress corrosion evaluation method and developed a variety of stress corrosion test methods according to actual operating conditions, there is still a lack of technology for evaluating the coupling aging behavior of crevice corrosion and stress corrosion. Therefore, the present invention proposes a A high-throughput evaluation method for stress corrosion that can simulate actual crevice environments

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