非水系中钴和镧钴合金的电沉积

Electrodepositioon of Cobalt and La-Co Alloy from Nonaqueous System

研究了在含Ｃｏ（Ⅱ）或含Ｃｏ（Ⅱ）＋Ｌａ（Ⅲ）的尿素－ＮａＢｒ－ＫＢｒ－甲酰胺体系中钴和镧钴合金的电沉积过程。测定了该体系中电极反应Ｃｏ（Ⅱ）十２ｅ＝Ｃｏ的传递系数及ＣＯ（Ⅱ）的扩散系数。在铜基体上得到含镧达５０Ｗｔ％的镧钴合金电沉积层。

Electrodeposition of cobalt and La-Co alloy from urea-NaBr-KBr-formamidesystem containing co (Ⅱ) or co (Ⅱ) +La (Ⅲ) is investigated. The transfe rcoefficients of Co(Ⅱ)+2e=Co and the diffusion coefficients of Co(Ⅱ) in the medium are determined. La-Co alloy deposits containing about 50 wt% of lanthanum may be obtained on copper substrates.