Amine derivatives as corrosion inhibitors

摘要

A method of acidizing a subterranean formation with an aqueous acid solution wherein the acid solution contains inhibiting amounts of an amine derivative prepared by reacting an unsaturated carboxylic acid with (a) fatty amine or polyamine, or (b) a fatty amido amine or polyamine, or (c) a fatty imidazoline amine or polyamine. The derivative is characterized by the absence of primary amino groups, and preferably contains only tertiary amino groups. The corrosion inhibitor is less toxic to the environment than other inhibitors.