Galvanic gold alloying bath
US5006208A · kind A · utility
7Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Aug 29, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/62
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Yellow to rose-colored gold alloy coatings with copper and silver are obtained from stable galvanic baths with a pH of 8.5 to 11 containing, 1 to 15 g/liter gold as potassium gold (I) cyanide, 5 to 50 g/liter copper as potassium copper (I) cyanide, 0.05 to 5 g/liter silver as potassium silver (I) cyanide and dipotassium hydrogenphosphate as well as alkali cyanides in amounts of up to 10 g/liter and 0.1-1 mg/liter potassium selenocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.