超塑性Al-Zn共析合金への電気めっきに対する前処理の検討
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概要
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Nickel electroplating on Al-Zn alloys zinc-replaced in Zincate bath was investigated. Nickel is satisfactorily plated on the alloys zinc-replaced in a highly concentrated sulfate bath, but not on the alloys heat treated. More adhesive nickel layers are plated by treating in 1.92 M/<I>l</I> HCl solution or in a mixed solution of 1.92 M/<I>l</I> HCl and 0.32 M/<I>l</I> HNO<SUB>3</SUB> prior to zinc replacement. Dissolution of zinc in the surface of alloys acid-treated particularly for 12 to 15 sec promotes replacement of zinc. Copper electroplating is also available. Cu-Ni-Cr multilayer plating is achieved by Cu-plating in the copper-pyrophosphate bath, Ni-plating in the Watts bath and Cr-plating in the Sargent bath.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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