Coating structure having corrosion resistance
US6312821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Aug 30, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/926
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The coating structure having a corrosion resistance of the invention contains a formation film formed on the surface of an aluminum alloy material. The formation film is subjected to a zirconium phosphate treatment. Because the zirconium phosphate reacts with an oxide film on the surface of the aluminum alloy to form a zirconium boehmite layer and to increase the adhesion of the coating material, a corrosion resisting structure is obtained without need of a sealing treatment while restraining the increase of the product cost. Also, a primer layer is formed on the outer surface of the formation film and the primer layer is composed of phosphomolybdic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.