Phosphatation of metallic surfaces
US4089708A · kind A · utility
1Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Apr 8, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/68
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A treatment of iron or steel surfaces to give them enhanced anti-corrosive and paint-retaining characteristics comprises the application, by spraying, dipping or otherwise, of a composition in the form of a solution of phosphates which includes an accelerating agent represented by a quantity of tungstate ion and which has a pH value in the range 5.8 to 6.5, and preferably 6.0 to 6.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.