オーステナイト系ステンレス鋼中のδフエライトの電解分離法の検討

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The present paper deals with the technique for the electrolytic isolation of δ ferrite fron the 18% Cr, 7% Ni, 1% Cu austenitic stainless steel in relation with the various conditions of electrolysis. The results obtained are as folloues. (1) The electrolyte, ECl-ethylalcohol, was most suitable for the electrolytic isolation of δ ferrite. Using the electrolyte, HCl-propylalcohol, only a part of δ ferrite existing in this steel could be isolated. However, δ ferrite could not be isolated in the case of using the electrolyte, HCl-methylalcohol. (2) δ ferrite could be most isolated in the case of using the electrolyte consisting of 4 or 5 vol (%) HCl, 96 or 95 vol (%) ethylalcohol and 36 gr zinc chloride. The concentration of HCl being set as low as 3vol (%), δ ferrite was contaminated with the matrix metal (γ phase) fallen down during electrolysis. On the other hand, it's concentration being set as much as 10 vol (%), δ ferrite could not be isolated. (3) δ ferrite could be more isolated from this steel at the value of pH>0.4 and with platinum cathode instead of mercury cathode.
社団法人日本鉄鋼協会の論文
1964-08-01