发明名称 |
Gold plating composition and method |
摘要 |
A bath for electroplating hard gold deposits at relatively high current efficiencies comprises an aqueous solution of an alkali metal dihydrogen phosphate, nitrilotris(methylene) triphosphonic acid, a nickel and/or cobalt phosphate compound, triethanolamine borate, alkali metal gold cyanide and a small amount of free alkali metal cyanide. The bath is maintained at a pH of 3.8-4.5 and operated at a current density of 0.1-20 amperes per square decimeter.
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申请公布号 |
US4197172(A) |
申请公布日期 |
1980.04.08 |
申请号 |
US19790027364 |
申请日期 |
1979.04.05 |
申请人 |
AMERICAN CHEMICAL & REFINING CO INC |
发明人 |
FLETCHER, AUGUSTUS;MORIARTY, WILLIAM L |
分类号 |
C25D3/48;C25D3/62;(IPC1-7):C25D3/62 |
主分类号 |
C25D3/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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