| Abstrakt: |
A brief survey of potentialities of the mass-spectral method for analysis and investigation of hydrogen in steels is presented. Published data and the results of investigations which have been carried out with the author's participation are used. It is shown that modern mass spectrometers are characterized by compactness, fast operation, high resolution, and sensitivity. They allow one to perform analysis over a wide range of atomic masses without any limitations on light elements including hydrogen. The mass-spectral method is very efficient for the determination of hydrogen in small samples, in gas mixtures, and for the separate analysis on the metal surface and in its body. For the study of local distributions of hydrogen, it is convenient to employ the mass-spectral method with a laser probe. The mass spectrometry of secondary ions is of special importance for investigations of hydrogen in steels. This is related to such characteristics and advantages as high sensitivity, the ability to determine hydrogen and its chemical compounds in monatomic layers, and the ability to study hydrogen distributions by the method of secondary-ion images. It is advisable to apply the method of high-temperature mass-spectrometry for analysis of sources of hydrogen ingress into steel during metallurgical, electrometallurgical, and welding processes. [ABSTRACT FROM AUTHOR] |
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