Process for the electrolytic pickling of high-grade steel strip
US5022971A · kind A · utility
4Cited by
1References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 13, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25F1/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a process for the electrolytic pickling of a high-grade steel strip, in particular a hot strip of high-grade steel, the hot strip of high-grade steel is alternately anodically and cathodically pickled in an aqueous solution of Na.sub.2 SO.sub.4 and subsequently in an aqueous solution of NaNO.sub.3 and NaF, as a result of which the formation of dangerous nitrous gases is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.