Etchant for aluminum alloys
US5895563A · kind A · utility
12Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Apr 20, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An iron immersion composition of matter is disclosed comprising a compound having a divalent or trivalent iron ion, a compound having a fluoride ion, and a compound having an acid hydrogen ion. A process for treating an aluminum substrate to improve the adhesion of metal layers to the substrate is also disclosed comprising contacting the substrate with the acidic iron immersion composition to produce an iron immersion coating on the alloy, and contacting the iron immersion coating with an etchant to substantially remove the coating and produce a microporous surface on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.