Bath and process for the phosphatization of metallic substrates, concentrates for the preparation of said bath and metallic substrates having been subjected to a treatment by said bath and process
US6068709A · kind A · utility
10Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1997 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Sep 2, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a process for the phosphatization of metallic substrates comprising the use of a phosphatization bath having a pH from 1 to 5.5 and which comprises from about 0.3 to about 25 g/l of zinc ion, preferably from 0.5 to 10 g/l, from 5 to about 50 g/l of phosphate ion, preferably from 8 to 30 g/l, and from about 0.01 to about 10 g/l, preferably from 0.03 to 3 g/l of a trivalent cobalt complex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.