A device and method for nondestructively measuring hydrogen content in solid steel

Abstract

A device and method for non-destructively measuring hydrogen content in solid steel. The device includes a high-temperature proton conductor, a support tube and a sealed cover; the outer wall of the high-temperature proton conductor is coated with a porous electrode and an auxiliary thermal electrode, and the inner wall is coated with a reference electrode; the reference electrode and The porous electrode is connected with the first voltmeter, and the porous electrode and the solid steel to be tested are connected with the second voltmeter; the solid steel to be tested is in pressure contact with the high-temperature proton conductor. The method is as follows: (1) passing a reference gas into a device for non-destructively measuring the hydrogen content in solid steel; (2) raising the temperature of the high-temperature proton conductor to the target temperature; (3) measuring the distance between the inner wall and the outer wall of the high-temperature proton conductor through the first voltmeter. Measure the voltage between the outer wall of the high-temperature proton conductor and the solid steel to be measured by the second voltmeter; (4) calculate the hydrogen content at the contact point between the high-temperature proton conductor and the solid steel to be measured. The invention can realize the non-destructive hydrogen measurement of the service steel parts, the test is accurate, and the test speed is fast; the steps are simple, and the hydrogen content of the steel parts can be scanned and measured point by point, and the hydrogen accumulation area can be found in time.

Description

technical field [0001] The invention relates to a technology for measuring hydrogen content, in particular to a device and method for nondestructively measuring hydrogen content in solid steel. Background technique [0002] Hydrogen is a harmful element in iron and steel materials, which will cause defects such as cracks and white spots in the material, and lead to hydrogen embrittlement of steel and reduce its mechanical properties; when steel materials are in an atmosphere containing water, hydrogen, or hydrogen sulfide, hydrogen or hydrogen-containing compounds will React with iron and steel materials to produce dissolved hydrogen, which enters the iron and steel materials, causing hydrogen embrittlement. During the use of steel materials, the fracture of hydrogen embrittlement materials will lead to accidents; therefore, measuring the hydrogen content in steel materials can detect high-risk hydrogen embrittlement materials in time, and can be replaced in time to avoid ac...

AI Technical Summary

Problems solved by technology

The electrochemical method can realize the hydrogen measurement of service steel parts, but due to the limitation of the electrolyte, it can only be practical at room temperature

The hydrogen diffusion coefficient in steel at room temperature is small, resulting in slow measurement speed; in addition, it is difficult to seal between the electrolyte and solid steel, and it is easy to produce a steel-electrolyte-gas three-phase interface, which causes the atmosphere to interfere with the measurement results; difficult sealing leads to This method is more suitable for point measurement, and cannot realize the point-by-point scanning test of steel parts, and the hydrogen distribution in steel is not uniform, making it difficult to find hydrogen accumulation areas

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