Process for preparing the metal surface of an article, especially one made of steel sheet, for direct-on enameling
US5766374A · kind A · utility
2Cited by
4References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 24, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Sep 24, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23D3/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Process in which the said surface is pickled and then treated in two steps, a first treatment step of so-called "amorphous" phosphatization, suitable for depositing a coat of at least 0.2 g/m.sup.2, followed by a second treatment step called "nickel plating". In this way, it is possible to limit the amount of sludge at pickling while at the same time obtaining good adhesion of the enamel. In a complete sequence for manufacturing an article formed from direct-on enameled metal sheet, the sheet may be formed after pickling, especially after the first step called phosphatization and before the second step called nickel plating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.