Fluoride cleaning of metal surfaces and product
US5373986A · kind A · utility
13Cited by
12References
7Claims
0Family size
Inventors
Key dates
| Filing date | Nov 4, 1992 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Nov 4, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G5/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of cleaning a metal surface includes covering the portion of the metal surface with a cleaning tape. The cleaning tape is chromium in combination with a fluoride ion source bound together by fibrillated polytetrafluoroethylene. This is applied to the portion of the area to be cleaned and is subject to heat treatment at about 1800.degree. F. and a reducing atmosphere of preferably hydrogen. This effectively cleans only the area covered by the tape. Further, the tape and binder format acts to force fluoride ions into the cracks on the surface providing a significantly improved cleaning operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.