The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 1995
Filed:
Oct. 15, 1993
Sayed S Shah, St. Louis, MO (US);
Thomas G Braga, St. Louis, MO (US);
Bernardus A Oude Alink, St. Louis, MO (US);
Jacob Mathew, St. Louis, MO (US);
Petrolite Corporation, St. Louis, MO (US);
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.