A device and method for dynamically measuring hydrogen trap parameters of metal materials

Abstract

The invention relates to material mechanical property testing equipment, and aims to provide a device and a method for dynamically measuring hydrogen trap parameters of a metal material. The device comprises a mechanical stress loading device, a hydrogen trap parameter testing system, a temperature control system and a master control system, wherein the hydrogen trap parameter testing system comprises an electrochemical workstation, a galvanostat, a test box and a hollow rod-shaped sample; the hollow rod-shaped sample penetrates through the test box, two ends of the hollow rod-shaped sample extend out, a cavity between the sample and the test box forms an external electrolytic cell, and a platinum sheet connected with the galvanostat is arranged in the external electrolytic cell; and an inner cavity of the hollow rod-shaped sample forms an internal electrolytic cell, and a reference electrode and an auxiliary electrode which are connected with the electrochemical workstation are arranged in the internal electrolytic cell. The device is simple in overall structure, convenient to install and low in cost; when the hollow rod-shaped sample is stretched, the external electrolytic cell and the internal electrolytic cell work synchronously, measurement of hydrogen trap parameters under the stress and hydrogen coupling effect is achieved, and the change of the hydrogen trap parametersof the metal material in the service process can be truly reflected.

Description

technical field [0001] The invention belongs to testing equipment for mechanical properties of materials, in particular to a device and method for dynamically measuring hydrogen trap parameters of metal materials. Background technique [0002] Hydrogen energy is a clean and efficient secondary energy, and is considered to be an important bridge connecting fossil energy to renewable energy. Vigorously developing hydrogen energy is an important measure for my country to transform energy consumption structure, ensure energy security, alleviate smog, promote greenhouse gas emission reduction, and maintain sustainable economic development. However, when metal materials are used in certain environments (such as high-temperature and high-pressure hydrogen environments, solutions containing hydrogen sulfide, or other acidic aqueous solutions), hydrogen will enter the interior of the materials. After hydrogen enters, it will degrade the properties of the material (such as reducing t...

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Problems solved by technology

At present, most of the experimental devices that can be used to study the behavior of hydrogen entering the interior of materials are complicated in equipment, cumbersome to install, and have large measurement errors in hydrogen trap parameters, and cannot test the hydrogen trap characteristics of metal materials under the coupling effects of stress, temperature and hydrogen.

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