Surface-treated steel sheet
US7875363B2 · kind B2 · utility
2Cited by
0References
3Claims
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Key dates
| Filing date | Nov 28, 2006 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Sep 30, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A surface-treated galvanized steel sheet includes a steel sheet, a zinc coating disposed on the steel sheet, and a film disposed on the zinc coating. The film has a thickness in the range of 0.01 to 3 μm and contains certain amounts of resin compound having a particular chemical structure, cationic urethane resin, vanadium compound, zirconium compound, compound having a phosphate group, and acid compound. The surface-treated galvanized steel sheet contains no hexavalent chromium in the film and is excellent in terms of corrosion resistance, alkali resistance, and solvent resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.