Coated steel sheet having excellent corrosion resistance and method for producing the same
US6562474B1 · kind B1 · utility
53Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jun 26, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31609
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.