Product of and process for preparing Zn-Ni-alloy-electroplated steel sheets excellent in corrosion resistance
US4610937A · kind A · utility
9Cited by
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15Claims
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Inventors
Key dates
| Filing date | Nov 28, 1983 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Nov 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12799
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Zn-Ni-alloy electroplating of steel sheets is carried out using a plating bath containing 10-40 g/l zinc, 15-160 g/l nickel, 0.1-5 g/l cobalt and 0.2-10 g/l titanium and 0.1-5 g/l aluminum or 0.1-5 g/l magnesium existing in the form of salts, the pH of which is 1.5-2.5. The obtained plated product exhibits improved excellent corrosion resistance and corrosion peeling resistance. The product can be subjected to heating to 60.degree.-200.degree. C., preferably in hot water, steam, or atomized water mist. This treatment further increases corrosion resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.