Use of bicarbonates and carbonates in metal cleaning formulations to inhibit flash rusting
US5853490A · kind A · utility
4Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1996 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G1/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Prevention of flash rusting of iron-containing substrates is achieved by contacting the substrates with aqueous solutions containing carbonate and/or bicarbonate salts. The treatment process can be effected during cleaning of the substrates with an aqueous alkaline cleaner or during a post cleaning step such as during rinsing of the substrates subsequent to cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.