Corrosion inhibition with bilayer-forming surfactants
US5456767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Oct 15, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for inhibiting corrosion of a metal surface in a liquid medium is described. The method comprises incorporating into the medium a corrosion inhibiting amount of a combination of a surfactant that forms a bilayer on the metal surface in the fluid and a corrosion inhibitor that solubilizes in the medium in the presence of the surfactant. The amount of surfactant is sufficient to produce a bilayer on the metal surface in the medium. The combination is a. an anionic surfactant that forms a bilayer on the metal surface and a cationic corrosion inhibitor; b. a cationic surfactant that forms a bilayer on the metal surface and an anionic corrosion inhibitor; c. an ionic surfactant that forms a bilayer on the metal surface and an ionic corrosion inhibitor having a pendent, generally straight chain hydrocarbon or substituted hydrocarbon moiety of from about 10 to about 18 carbon atoms; or d. an ionic surfactant that forms a bilayer on the metal surface and a non-ionic corrosion inhibitor. Related compositions and methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.