Conversion coating composition, surface treated steel sheet, and method for manufacturing the same
US9683294B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Jul 10, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12549
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A conversion coating composition comprising 0.01 wt % to 0.2 wt % of phosphorous (P); 0.01 wt % to 0.2 wt % of magnesium (Mg); 0.005 wt % to 0.15 wt % of zirconium (Zr); 0.005 wt % to 0.15 wt % of titanium (Ti); 0.005 wt % to 0.15 wt % of vanadium (V); 0.05 wt % to 1 wt % of phenol resin; the balance of water and other unavoidable impurities is provided. A surface treated steel sheet comprising a base steel sheet; a zinc or zinc alloy plated layer formed on the base steel sheet; a blackening layer formed on the zinc or zinc alloy plated layer; and an organic and inorganic complex conversion coating layer formed on the blackening layer, wherein the organic and inorganic complex conversion coating layer may satisfy the weight ratio of P:Mg:Zr:Ti:V=1:0.045 to 2:0.035 to 1.5:0.035 to 1.3:0.035 to 1.5 (based on the weight of P) is also provided. A method for manufacturing a steel sheet treated with the conversion coating composition is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.