Surface treatment aqueous solution for metal
US5942052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface treatment aqueous solution is provided which is superior in corrosion resistance and coating adhesiveness as well as in ability of inhibiting the production of precipitate. A tinned DI can, which has been degreased, is conversion coating processed in a treatment bath filled with a surface treatment aqueous solution containing at least phosphate ions, organophosphonate compound and tin ions with a pH value of 5 or less. After the conversion coating, the DI can is washed with water and dried. A preferable organophosphonate compound is one in which a phosphorus atom constituting a phosphonate group is bonded to a carbon atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.