フーリエ変換赤外分光法によるティンフリースティールのクロム水和酸化物層の状態分析(表面分析)(<特集>分析評価・解析)

概要

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The chemical state of the water in the hydrated chromium oxide film on Tin Free Steel (TFS) was studied under atmospheric pressure using Fourier Transform Infra-red Spectrometer (FTIR). Following results were obtained ; (1) Emission spectra can be measured at as low as 50℃ where a dehydration commences. The characteristic bands in emission spectra agree well with those in reflection-absorption spectra. (2) A broad and weak absorption is observed at 950 cm^<-1>. It is attributed to the water in the film, because it disappears when TFS is heated at 200℃. On the contrary, the absorption caused by bending vibration in HOH at 1590 cm^<-1> remains even after heating at 300℃. It is therefore presumed that there are two chemical states of the water in the film, and the absorption at 950 cm^<-1> corresponds to the water which is free from the chemical structure of the film. (3) A clear correlation is found between the lacquer adhesivity of TFS and the ratio of the absorption intensitys at 1590 cm^<-1> and 950 cm^<-1>. This relation can be utilized for evaluation of the lacquer adhesivity.
社団法人日本鉄鋼協会の論文
1991-11-01