Process for surface-treating an aluminum-containing metal
US6306226A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 23, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 23, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F2245/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aluminum-containing metal material for, for example, a heat-exchanger for motorcars is surface-treated by chemically etching an Al-containing metal material surface, forming a first protective layer on the etched surface by a chemical conversion treatment with an aqueous solution of Zr phosphate or Ti phosphate, and coating the first protective layer with a second protective layer containing a hydrophilic resin including non-cross-linked hydrophilic functional groups and at least partially cross-linked reactive functional groups different from the hydrophilic functional groups, to impart high hydrophilicity and resistance to odor generation and corrosion to the aluminum-containing metal material surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.