Pickling high-grade steel
US5130000A · kind A · utility
1Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Jul 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25F1/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Process for pickling high-grade steel, preferably high-grade steel hot strip, the high-grade steel being subjected to pickling with neutral electrolyte as well as to an after-treatment with mixed acid, nitric acid or a mixture of iron fluoride and hydrofluoric acid, the pickling with neutral electrolyte being preceded by a pre-treatment with sulfuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.