Chromate-plating bath and process for finishing zinc zinc alloy or cadmium surfaces
US5876517A · kind A · utility
21Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Oct 28, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/84
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Process for finishing zinc, zinc alloy or cadmium surfaces which consists in bringing the components to be treated into contact first with an acidic chromate-plating bath based on chromium, cobalt and silver salts and then with a top coat bath comprising a colloidal silica, a corrosion inhibitor, a complexing agent, a surfactant and a black dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.