Method for rendering non-ferrous metals corrosion resistant
US4311738A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1980 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | May 27, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Non-ferrous metal substrates such as aluminum are coated with a composition consisting essentially of a dispersion of colloidal titania particles in a water/polar organic solvent medium of a partial condensate formed by hydrolyzing a silane such as methyltrimethoxysilane in the presence of the colloidal titania particles and in the presence of a sufficient amount of an acid such as acetic acid to provide a pH in the range of from 2 to 6. Optionally, the composition can contain up to 20 weight percent of colloidal silica and/or up to 5 weight percent of other types of monoorganosilsesquioxanes based upon the total weight of solids in the composition. The coated substrates are heated until the coating cures, preferably at 50.degree. C. to 150.degree. C., to form a transparent coating which renders the substrate more resistant to corrosion induced by acids or salts such as road salt or ocean spray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.