Non-chrome passivation process for zinc and zinc alloys
US6524403B1 · kind B1 · utility
9Cited by
16References
18Claims
0Family size
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Aug 23, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C28/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A non-chrome containing composition and process are disclosed for enhancing the corrosion resistance of zinc or zinc alloy surfaces. The composition comprises a source of titanium ions or titanates, an oxidant and fluorides or complex fluorides. The composition also preferably comprises an organic acid and/or a Group II metal compound, preferably a Group II metal chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.