冷硝酸法の鋼中非金属介在物分析への適用に関する基礎的研究

概要

論文の詳細を見る
A fundamental study has been made on application of the cold HNO_3 method to extraction and analysis of inclusions in steel, particularly in rimmed steel. Potentials in cold HNO_3 media are measured with use of a Pt electrode against saturated calomel electrode, and chemical behaviors of several compounds in cold HNO_3 are also investigated. The followings are the results obtained ; (1) The potential in cold HNO_3 is found to vary remarkably around the concentration of (1+1) of HNO_3, thus showing higher value at the higher concentration whereas lower one at the lower concentration of HNO_3. (2) Direction of current between pure iron electrode and S. C. E. in cold HNO_3 cell is observed to be different at the concentrations of (2+1) and (1+1) of HNO_3. (3) Ferrous iron compounds such as FeO, FeS and FeO-silicate are stable in cold HNO_3, but MnO, MnS and compounds containing much quantity of Mn component are easily attacked by cold HNO_3. (4) The cold HNO_3 method is found useful for extraction and analysis of inclusions in steel, having an advantage of choice of adequate concentration and temperature of cold HNO_3 according to the purpose.
社団法人日本鉄鋼協会の論文
1972-12-01