Process of pickling stainless steel
US6250314A · kind A · utility
6Cited by
16References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Jul 15, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G1/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process and apparatus for pickling the surface of stainless steel strip feeds the stainless steel strip through a plurality of pickling tanks containing a hydrochloric acid pickling acid. The pickling acid bath is maintained at a temperature of at least about 40.degree. C. An oxidizing agent is added to the acid solution in an amount to maintain at least about one third and preferably at least about half of the soluble iron in the form of ferric chloride based on the total amount of iron in the acid solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.