Baths and process for chemical polishing of stainless steel surfaces
US4678541A · kind A · utility
8Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1986 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Jun 2, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F3/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Baths for chemical polishing of stainless steel surfaces, comprising, in aqueous solution, a mixture of hydrochloric acid, phosphoric acid and nitric acid, ferricyanide complex ions and an additive capable of decomposing nitrous acid. The baths can be used in particular for chemical polishing of heat exchangers with a very large exchange surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.