グロー放電発光分光法によるめつき層およびクロメート皮膜の定量分析

概要

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Factors which determine the Grim glow discharge characteristics, sputtering rate and emission yield were studied in order to obtain quantitative depth profiles of surface films on steel sheets using the glow discharge spectrometry (GDS). 1) The sputtering rate of a specimen (with a constant composition) depends on the product of the effective discharge voltage and the courrent, being indifferent of the Ar pressure and the discharge modes (constant voltage, constant current and constant power). 2) The emission yield (within the abnormal glow discharge reange) on the three modes increases depending on the Ar pressure. 3) Some matrix effects are observed in the emission yield of zinc and iron for Zn-Fe alloy plating. The emission yield, therefore, should be corrected according to approximate alloy composition in order to obtain accurate results. 4) GDS can also be applied for the analysis of very thin layers, such as chromate film on the top of tin plates. The coefficient of variance of the analysis of Ni, Su and Cr (chromate) layers (the total thickness 100 nm) is less than 5%.
社団法人日本鉄鋼協会の論文
1987-03-01