Water soluble composition as metal surface coating in the form of dry films proof to atmospheric corrosion
US6464763B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | May 22, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/48
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A composition for use in forming a dry film coating on metal surfaces to at least temporarily protect the surfaces from oxidation comprises at least 20% by weight of a combination of at least one saturated linear carboxylic monoacid with at least one unsaturated linear carboxylic monoacid. The monoacids are in the form of alkaline, alkaline-earth or amine salts. The carbon chain of each acid comprises an uneven number of carbon atoms varying from 5 to 21. At least 0.5% by weight of a triazole derivative can be added to enhance the anti-corrosion effect. The composition is water-soluble and the dry protective film can be formed by diluting the composition in water, applying the diluted composition to a metal surface and then air drying it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.