Surface-treated steel sheet and production method therefor
US6677053B2 · kind B2 · utility
17Cited by
2References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12799
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface-treated steel sheet includes a steel sheet, an Al—Zn-base alloy plating layer formed on the steel sheet, a chemical conversion film provided on the alloy plating layer, and a concentric layer of a Cr compound that is formed on the alloy plating layer of the chemical conversion film. The surface-treated steel sheet may include a steel sheet, an zinc-base plating layer formed on the steel sheet, and a film that contains chromium and calcium and that is formed on the zinc-base plating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.