Patent ID: 6365067
Filing Date: 2002-04-02
Classification: C09K,C23F

Abstract:
A method for inhibiting corrosion of an iron-based alloy in contact with the production or processing of a hydrocarbon comprising:providing the hydrocarbon in contact with the iron-based alloy; and adding a corrosion inhibiting effective amount of a composition to the fluid, where the composition comprises a water soluble mercaptoalcohol selected from the group consisting of mercaptoalcohols having the formula: (HS)nâ€”Râ€”(OH)m â€ƒwhere R is a straight branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent is selected from the group consisting of N, O, S and P, and having the formula: â€ƒwhere Râ€² and Râ€³ are independently selected from the group consisting of H, straight, branched, cyclic or heterocyclic, alkyl, aryl, alkylaryl and arylalkyl where the heteroatom in the heterocyclic moiety is selected from the group consisting of N, O, S and P, and where the total number of carbon atoms in the mercaptoalcohol is from 1 to 8, and at least one additional corrosion inhibitor selected from a group consisting of corrosion inhibitors consisting of imidazolines, amides, amines, quaternary amines, phosphate esters, polycarboxylic acids, and mixtures thereof.