Abstract：The analytical method of gaseous elements in metal has already existed for more than 6 years. The detection methods are different from those for other chemical elements. Five typical cases (hydrogen in aluminum, argon in metal, helium in metal, hydrogen in rare earth steel, and oxygen in aluminum or magnesium) were listed for technical exchange and discussion. Among the analysis of gases in metals, the analysis of hydrogen in aluminum is the most difficult. Some researchers tried to simplify the analysis method of hydrogen in aluminum. It was expected to obtain the results rapidly and accurately like that in steel. For example, the commonly used impulse fusion method was tested a hundred times, but it was not successful. Then high frequency (or tubular furnace) heating extraction was adopted, which made the testing of hydrogen in aluminum simple like that of hydrogen in steel. With the aid of legal argon co-detector by impulse mass spectrometry, the reliable analysis method of argon in metal was established. The proposed method has been used for more than ten years. For the determination of helium in metal, the fast interface attachment were usually self-developed and the testing was conducted in the existing hydrogen determinator. The phenomenon of "zero peak value" occurred in the analysis of hydrogen in rare earth steel. The peak of hydrogen was not observed in three instruments from three domestic senior departments. Theoretically, it was due to the influence of rare earths. The fusion method and extraction method were compared to provide the evidence that the analysis of hydrogen in steel was interfered by rare earths. The sample was not melted in thermal extraction method, thus reducing the interference of rare earth pollution to the minimum level, and the peak of hydrogen in rare earth steel could be obtained. The chemical activity of magnesium was strong. During the determination of oxygen in magnesium by impulse fusion method, the interference of volatile pollution was very serious. Some researchers tried to use such instrument for the analysis of oxygen content in magnesium, and the domestic export data were finally consistent with the foreign entry data. Then the difficulty for oxygen detection in magnesium was solved by employing exclusive instrument with special technical scheme.
朱跃进, 朱瑛才. 金属中气体元素分析典型案例[J]. 冶金分析, 2022, 42(1): 1-9.
ZHU Yuejin, ZHU Yingcai. Typical case study on analysis of gaseous element in metal. , 2022, 42(1): 1-9.
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