Composition for metal surface treatment, metal surface treatment method and metal material
US8287662B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2007 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31529
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A composition for metal surface treatment can form a chemical conversion coating film which achieves sufficient foundation surface concealment, coating adhesion and corrosion resistance. A method for treating the surface of a metal material with such a composition for metal surface treatment is used. Specifically a metal surface treatment composition used for a treatment of a metal surface, contains a zirconium compound and/or a titanium compound, and a polyamine compound having a number average molecular weight of not less than 150 but not more than 500,000. The polyamine compound contains not less than 0.1 millimole but not more than 17 millimoles of a primary and/or secondary amino group per 1 g of the solid content, and the content of the zirconium compound and/or titanium compound in the metal surface treatment composition is not less than 10 ppm but not more than 10,000 ppm in terms of metal elements. The mass ratio of the zirconium element and/or titanium element contained in the zirconium compound and/or titanium compound relative to the polyamine compound is not less than 0.1 but not more than 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.