抄録
The present paper deals with the technique for the electrolytic isolation of δ ferrite iron 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, EC1-ethylalcohol, was most suitable for the electrolytic isolation of δ ferrite.Using the electrolyte, HC1-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, HC1-methylalcohol
(2)δ ferrite could be most isolated in the case of using the electrolyte consisting of 4 or 5vol (%) HC1, 96 or 95 vol (%) ethylalcohol and 36 gr zinc chloride.The concentration of H Cl being set as low as 3vol (%), S 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 (%), 6 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.
