Electrochemical in-situ measuring device for stress corrosion and hydrogen measurement under slow strain rate conditions

Abstract

An electrochemical in-situ measurement device for stress corrosion and hydrogen measurement under slow strain rate conditions. It includes electrochemical workstation, auxiliary electrode, working electrode, reference electrode, tensile sample, slow strain tensile machine, computer, isolation transformer, corrosion device and hydrogen measuring device. The effect of the present invention: under the condition of slow strain rate, the electrochemical in-situ test of stress corrosion and hydrogen permeation can be carried out respectively by replacing the corrosion electrolytic cell, which has the advantages of adjustable sample size, in-situ electrochemical measurement, accurate load-displacement reading, and structure Simple, easy to use and flexible, easy to operate and so on. The device can realize the in-situ electrochemical behavior detection of tensile stress, corrosive liquid, corrosive gas and temperature at the same time, and can be widely used in the research of strain rate, tensile stress, corrosive medium type and concentration, pH value, temperature, corrosive gas distribution, etc. The impact of pressure and concentration, "hydrogen embrittlement" on the corrosion of metal materials, and the damage evolution of materials can be analyzed through electrochemical data.

Description

technical field [0001] The invention belongs to the technical field of corrosion electrochemical measurement, in particular to an electrochemical in-situ measurement device for stress corrosion and hydrogen measurement under the condition of slow strain rate. Background technique [0002] Studies have shown that electrochemical measurement is an important means to study corrosion. Previous electrochemical measurement devices for stress corrosion were mainly used to study the stress corrosion cracking behavior of metal materials, mechanical parts or components, that is, under static stress (mainly tensile stress) and corrosion The failure phenomenon caused by the combined action of the medium. In this process, electrochemical measurements are often performed by applying a certain stress or strain and then unloading. There are few devices that directly perform electrochemical in-situ testing during the stress or strain process. In particular, the strain rate is required to be...

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Problems solved by technology

Although the device has the advantages of small size, simple operation, and can meet the needs of electrochemical testing, it cannot perform temperature control, corrosion experiments under the combined action of corrosive gas and stress corrosion, and the shape of the sample cannot be adjusted.

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