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.

主权项

1. A method for decreasing corrosion of a metal surface in a corrosive environment, where the method comprises:
incorporating a corrosion inhibitor additive into a corrosive environment in contact with the metal surface in an effective amount to at least partially decrease corrosion of the metal surface based on the total amount of the corrosive environment; where the corrosion inhibitor additive comprises at least one first inhibitor; where the at least one first inhibitor has the formula (A): wherein x is oxygen or hydrogenated nitrogen or quaternized nitrogen; R1, R2, R3 and R4 are independently hydrogen, methyl or an alkyl group; n, p and q are independently integers from 1 to 100; and where less corrosion of the metal surface occurs as compared to an otherwise identical method absent the corrosion inhibitor additive.