Hot-dip Al—Zn coated steel sheet
US9234267B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2011 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Feb 8, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/27
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is provided a hot-dip Al—Zn coated steel sheet that has a steel sheet containing Si and Mn as a base steel sheet and has excellent coating appearance and corrosion resistance. The Al—Zn coating layer has an Al content in the range of 20% to 95% by mass. The Al—Zn coating layer has a Ca content in the range of 0.01% to 10% by mass. Alternatively, the Ca and Mg content is in the range of 0.01% to 10% by mass. A steel sheet surface layer within 100 μm from a surface of the base steel sheet directly under the Al—Zn coating layer contains less than 0.060 g/m2 per surface of an oxide of at least one selected from Fe, Si, Mn, Al, P, B, Nb, Ti, Cr, Mo, Cu, and Ni in total.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.