Surface treatment chemical and bath for aluminum and its alloy
US4992115A · kind A · utility
29Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Feb 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface treatment chemical for aluminum or its alloy comprising 10-1000 parts by weight of vanadium or cerium ion, 10-500 parts by weight of zirconium ion, 10-500 parts by weight of phosphate ion and 1-50 parts by weight of effective fluorine ion. A surface treatment bath for aluminum or its alloy comprising 10-1000 ppm of vanadium or cerium ion, 10-500 ppm of zirconium ion, 10-500 ppm of phosphate ion and 1-50 ppm of effective fluorine ion, and having pH of 2.0-4.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.