Corrosion inhibition with bilayer-forming surfactants

Details Corrosion inhibition with bilayer-forming surfactants Corrosion inhibition with bilayer-forming surfactants

1993-10-15

1995-10-10

Simmons, David A.

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

106 1405, 106 1415, 106 1416, 106 1441, 106 1442, 106 1443, 148245, 148250, 148255, 148270, 148271, 148274, 148283, 252390, 422 7, 422 12, 422 16, C23C 2200, C23F 1100

Patent

active

054567670

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.

REFERENCES:
patent: 4332967 (1982-06-01), Thompson et al.
patent: 4393026 (1983-07-01), Thompson et al.
patent: 4770906 (1988-09-01), Harwell et al.
patent: 4900627 (1990-02-01), Harwell et al.
patent: 4981609 (1991-01-01), Thompson et al.
patent: 5013483 (1991-05-01), Frenier et al.
patent: 5106691 (1992-04-01), Harwell et al.
patent: 5336441 (1994-08-01), Shah et al.

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