Coating solution for metal surfaces
US3964936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1974 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Dec 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D1/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An acidic aqueous coating solution for forming on an aluminum surface a coating which is corrosion resistant and to which overlying coatings adhere excellently is disclosed. The coating solution contains compounds of zirconium and fluorine. The use of boric acid in the solution is disclosed also. The coating solution is capable of forming on an aluminum surface a uniformly colorless and clear coating so that the coated surface has the appearance of the underlying metal surface, that is, the coating can be formed without changing the appearance of the metal surface. When coating a shiny bright aluminum surface, there can be produced a coated surface having a uniformly shiny bright appearance which is maintained even after the coated surface is subjected to boiling water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.