Etchant for aluminum alloys
US5601695A · kind A · utility
17Cited by
25References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A tin immersion composition of matter is disclosed comprising a compound comprising divalent tin ion, a compound comprising fluoride ion, and a compound comprising acid hydrogen ion. A process for treating an aluminum-copper or an aluminum-silicon alloy to improve the adhesion of metal layers to the alloy is also disclosed comprising contacting the alloy with an acidic tin immersion composition to produce a tin immersion coating on the alloy, and contacting the tin immersion coating with an etchant to substantially remove the tin immersion coating and produce an etched alloy surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.