Experimental device and test method for electrochemical corrosion of specimens loaded with bidirectional tensile stress

Abstract

The invention discloses a two-way stretch stress loading sample corrosion electrochemistry experiment device and a testing method. The two-way stretch stress loading sample corrosion electrochemistry experiment device comprises a two-way stretch stress loading mechanism, a cross-shaped sample, a corrosion reaction tank, an electrochemical testing system and a control system, wherein the cross-shaped sample is arranged in a clamp of the two-way stretch stress loading mechanism and can be set to bear different proportions of two-way stress and simulating an actual situation of pipeline work; the corrosion reaction tank is capable of providing multiple component experimental media and working environments. By utilizing the two-way stretch stress loading sample corrosion electrochemistry experiment device and the testing method thereof, disclosed by the invention, a corrosion behavior and a rule of a metal material under various working situations and the two-way stress can be researched and simulated.

Description

technical field [0001] The invention belongs to the technical field of electrochemical measurement of stress corrosion, and specifically relates to a device for simulating corrosion experiments and electrochemical tests when a metal sample is loaded with biaxial tensile stress, and a method for in-situ electrochemical real-time monitoring using the device. That is, a test device and test method for electrochemical corrosion of a sample loaded with bidirectional tensile stress. Background technique [0002] In the actual use process, metal materials will not only be affected by corrosive media, but also be affected by various stresses, and often cause more serious corrosion damage. The oil and gas industry generally uses buried pipelines to transport medium under high pressure. In complex working environments, the synergistic effect of corrosive medium and stress causes the problem of stress corrosion cracking (Stress Corrosion Cracking, SCC) in pipeline steel, which has beco...

AI Technical Summary

Problems solved by technology

So far, biaxial stretching experiments have not yet formed a unified standard and method. Many researchers have adopted experimental methods such as punching mode biaxial stretching and film swelling biaxial stretching, and have achieved certain results.

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