Compositions for treatment of metallic surfaces by means of fluorophosphate salts
US4132572A · kind A · utility
18Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Apr 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/83
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Steel, aluminum and aluminum alloys, zinc and zinc alloys are treated to improve corrosion resistance with an aqueous solution of a fluorophosphate salt to passivate the metal surface, before or after phosphatizing and prior to painting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.