Black zinc-plated steel sheet
US7186467B2 · kind B2 · utility
5Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2004 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Jan 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A black galvanized steel sheet including a composite coating layer formed on a surface of a blackened galvanized steel sheet by applying a treatment solution containing a phosphate ion, a vanadate ion, a metal ion, an α,β-unsaturated carboxylic acid and a glycoluril resin; and an organic resin layer formed on the composite coating layer, is provided. The black galvanized steel sheet is excellent in heat absorption and heat dissipation, electrical conductance, and corrosion resistance in a worked portion. Furthermore, the black galvanized steel sheet does not include hexavalent chromium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.