Trivalent chromium electroplating baths and method
US4107004A · kind A · utility
8Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1977 |
| Grant date | Aug 15, 1978 |
| Priority date | — |
| Expiry date | Nov 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aqueous trivalent chromium plating bath having low temperature stability comprising trivalent chromium ions preferably in a concentration of at least 0.2 M, sulphate ions preferably in a concentration of at least 0.3 M, a weak complexing agent for the chromium ions in a concentration of at least 0.1 M, and fluoride ions in a concentration of at least 0.025 M. The bath preferably also contains chloride ions in a concentration of at least 0.1 M.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.