Stress corrosion and hydrogen measuring electrochemical in-situ measurement device under slow strain speed condition

Abstract

The invention provides a stress corrosion and hydrogen measuring electrochemical in-situ measurement device under a slow strain speed condition. The stress corrosion and hydrogen measuring electrochemical in-situ measurement device comprises an electrochemical work station, an auxiliary electrode, a working electrode, a reference electrode, a stretching test sample, a slow strain stretching machine, a computer, an isolation transformer, a corrosion device and a hydrogen measuring device. The stress corrosion and hydrogen measuring electrochemical in-situ measurement device has the effects that an electrochemical in-situ test can be carried out on stress corrosion and hydrogen permeation respectively under the slow strain speed condition through replacing a corrosion electrolytic tank; the device has the characteristics of adjustable test sample size, in-situ electrochemical measurement, accurate load-displacement readings, simple structure, convenience and flexibility in utilization, simplicity in operation and the like. The device can be used for simultaneously realizing in-situ electrochemical behavior detection of pull stress, corrosive liquid, corrosive gas and temperatures, and can be widely applied to researches of strain speeds, the pull stress, types and concentrations of corrosive media, pH values, temperatures, corrosive gas partial pressure and concentration and influences on corrosion of metal materials by hydrogen brittleness, and a damage evolution rule 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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