| 摘要 |
PURPOSE:To dispense with or facilitate levigation for removing carbide or oxide mixed in a metal, by precipitating particles of nonmetal impurities in a specimen metal to the bottom of a reticulated container by electrolyzing the specimen metal which has been received in the reticulated container having elctrolyte resistance as an anode. CONSTITUTION:A specimen metal, for example, a steel piece 2 is put in a reticulated container 5 made of Teflon having resistance to an electrolyte 3 prepared by adding hydrochloric acid to an aqueous FeCl2 solution as an anode. A stainless steel net is used as cathode and inert gas such as Ar or N2 gas is blown into the electrolyte 3 in order to stirr said electrolyte and to prevent the oxidation thereof while a cooling pipe 8 is used in order to prevent the rising in a temp. The steel of the steel piece 2 is rapidly dissolved by this method but electrolysis is performed at current density highly selected in such a limit that the nonmetal impurities in the steel piece 2 are not dissolved. By this method, the nonmetal impurities are accumulated on the bottom of the container as slime 6. Even if hydroxide or carbide coexists in the slime, they have a fine particle form and easily pass through meshes and, therefore, easily separated from oxide. |
