Aluminum surface cleaning agent
US4886616A · kind A · utility
17Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G1/125
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Chromium free cleaning compositions for cleaning aluminum and aluminum alloy surfaces comprising PA1 A. from 0.2-4 g/l ferric ion and PA1 B. sufficient sulfuric and/or nitric acid to produce a pH of 2 or less. The invention also relates to compositions containing from 0.001-0.5 g/l of fluoride ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.