Sol-gel method for producing an anti-corrosion coating on a metal substrate
US11519072B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 20, 2017 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C18/1279
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sol-gel method for producing an anti-corrosion coating consisting of at least one layer of an oxide on a metal substrate. A non-aqueous solution of a precursor of the oxide is prepared and deposited on one surface at least of the metal substrate in order to cover said surface at least partially with a film comprising the precursor of the oxide. Hydrolysis-condensation of the precursor of the oxide is carried out by exposing the film to a humid atmosphere in order to form an oxide network in the film. Then, a treatment for stabilizing the film on the surface of the substrate is carried out, followed by a heat treatment of the surface of the metal substrate in order to crystallize the network of oxide and form the anti-corrosion coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.