鋼中炭化物の抽出ならびに定量法に関する研究(<特集>鉄鋼分析)

概要

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Some mineral acid separation and potentiostatic electrolysis method for isolation and determination of various carbides in steels have been fundamentally investigated. The results obtained are summerized as given below. 1. Globular and coarse Fe_3C and other various carbides such as TiC, ZrC, VC, NbC, (Cr, Fe)_7C_3, (Cr, Fe)_<23>C_6, Mo_2C and (Fe, W)_6C were extracted quantitatively by means of potentiostatic electrolysis method with 15% sodium citrate-1.2% KBr-30% citric acid or acethyl aceton-1% tetramethyl ammonium chlolide-methanol electrolyte. 2. The reproducible separation of TiC, VC and NbC with HCl(1+1) and (Cr, Fe)_7C_3, (Cr, Fe)_<23>C_6 and Mo_2C with H_3PO_4(2+1) could be successfully accomplished if these carbides were relatively coarse. 3. TiC, ZrC and VC being considered insoluble in mineral acids were found to be attacked gradually by diluted HCl, H_2SO_4 and H_3PO_4 and were mare easily dissolved as the particles of the carbide were fine.
社団法人日本鉄鋼協会の論文
1974-11-01