发明名称 |
PLATING BATH AND METHOD FOR ELECTROPLATING TIN-ZINC ALLOYS |
摘要 |
The present invention relates to an aqueous plating bath for electrodeposition of tin-zinc alloys comprising at least one bath-soluble stannous salt, at least one bath soluble zinc salt, and a quaternary ammonium polymer selected from a ureylene quaternary ammonium polymer, an iminoureylene quaternary ammonium polymer or a thioureylene quaternary ammonium polymer. The plating baths also may contain one or more of the following additives: hydroxy polycarboxylic acids or salts thereof such as citric acid; ammonium salts; conducting salts; aromatic carbonyl-containing compounds; polymers of aliphatic amines such as a poly(alkyleneimine); and hydroxyalkyl substituted diamines as metal complexing agents. The plating baths of this invention deposit a bright and level deposit, and they can be adapted to provide plated alloys having high tin concentration over a wide current density range.
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申请公布号 |
CA2359444(C) |
申请公布日期 |
2010.06.29 |
申请号 |
CA20012359444 |
申请日期 |
2001.10.17 |
申请人 |
ATOTECH DEUTSCHLAND GMBH |
发明人 |
OPASKAR, VINCENT C.;CAPPER, LEE DESMOND |
分类号 |
C25D3/56;C25D3/60;C25D5/00 |
主分类号 |
C25D3/56 |
代理机构 |
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