Treatment for galvanized metal
US5344504A · kind A · utility
15Cited by
15References
1Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 22, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Jun 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/34
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aqueous coating solution for zinc containing metals such as galvanized iron and steel. The coating solution is resistent to the formation of zinc induced sludge and can be operated with little or no overflow. The aqueous treatment solution contains from 0.1 to 10 grams per liter of a fluorometallic acid, from 0.015 to 6 grams per liter of a salt of a transition metal, from 1 to 30 grams per liter zinc; and optionally from 0.1 to 3 grams per liter a polymer of acrylic acid, methacrylic acid, or an ester thereof with a C1 to C8 alkanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.