Electrodeposition of black chromium
US4196063A · kind A · utility
7Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1979 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | Apr 19, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/40
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An electrolyte solution and the method of using same for electrodeposition of black chromium on a substrate, said solution comprising water, trivalent chromium ions, ions of a metal selected from the group consisting of iron and cobalt, a weak complexing agent for the trivalent chromium ions, and phosphate ions. The preferred complexing agents are hypophosphite or formate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.