Process for the treatment of aluminum based substrates for the purpose of anodic oxidation, bath used in said process and concentrate to prepare the bath
US5460694A · kind A · utility
23Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1993 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Jun 17, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/16
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Process for the treatment of aluminum based substrates for the purpose of their anodic oxidation, comprising a surface treatment or chemical etching step using an acid bath comprising at least one fluorinated derivative of titanium and/or of zirconium and/or of silicium as well as at least one acid of the group comprising NO.sub.3 H, SO.sub.4 H.sub.2 and phosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.