Non-chrome rinse for phosphate coated ferrous metals
US6027579A · kind A · utility
12Cited by
15References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1997 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Jul 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention provides a non-chrome rinse and method for treating a phosphate conversion-coated ferrous metal substrate. The rinse comprising zirconium ions, vanadium ions, fluoride ions, and phosphate ions in a ratio and a concentration effective for providing the phosphate conversion-coated ferrous metal substrate with improved corrosion resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.