Thermal degreasing in reactive atmospheres and subsequent brazing of aluminum-based sheets or parts
US5016809A · kind A · utility
10Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G5/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Aluminum-based sheets or parts, such as formed aluminum assemblies contaminated with forming die lubricants, are cleaned by a solventless, thermal degreasing process at controlled temperature (about 300.degree.-400.degree. F.), and in specified atmospheres (reactive gas which is at least at atmospheric pressure) prior to brazing. The organic contaminates on the aluminum-based sheet or part are reacted with the reactive gas (air or oxygen) and removed from the surface of the sheet or part without disruption of the underlying protective oxide layer. Subsequent brazing is thereby facilitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.