Methods and electrolyte compositions for electrodepositing chromium coatings
US5415763A · kind A · utility
14Cited by
13References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Aug 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Methods for electrodepositing a chromium coating on a substrate comprising mmersing the substrate in an aqueous electrolyte, and passing a sufficient current through the electrolyte to effect deposition of a chromium coating on the substrate. The aqueous electrolytes comprise from about 0.2 to about 0.6 mol/l of trivalent chromium ions, greater than about 1.4 mol/l of an amidosulfonic acid or a salt thereof, ammonium ions, formic acid or a salt thereof, and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.