DECREASING CORROSION ON METAL SURFACES

摘要

A corrosion inhibitor additive may be circulated in a subterranean formation in an effective amount to decrease metal corrosion in a high temperature environment. The corrosion inhibitor additive may include at least one first inhibitor and at least one second inhibitor. The second inhibitor(s) may include imidazolines, quaternary amines, phosphate esters, and combinations thereof. The first inhibitor(s) may have one of the following formulas: wherein x is oxygen or hydrogenated nitrogen or quaternized nitrogen; R1, R2, R3 and R4 are independently hydrogen, methyl or an alkyl group; p, q and n are integers from 1 to 100; and SH-CH2-[CH2-O-CH2]z-CH2-SH (A1 ) where z is an integer ranging from 1 to 100.