2-Substituted Imidazole and Benzimidazole Corrosion Inhibitors

摘要

Disclosed are methods of using nitrogen-containing compounds as corrosion inhibitors. The present method is used to inhibit corrosion of a metal surface in contact with an aqueous system using 2-substituted imidazoles and 2-substituted benzimidazoles, and provides enhanced protection against corrosion of metals in the aqueous system. The method comprises the use of corrosion inhibitors that are generally resistant to halogen attack and provide good corrosion resistance in the presence of oxidizing halogen-based biocides. Formulations comprising 2-substituted imidazoles and 2-substituted benzimidazoles are also disclosed.

主权项

1. A method for inhibiting corrosion of a metal surface in contact with an aqueous system. The method comprises adding to the aqueous system a compound of formula (I), wherein each X is the same or different, and is selected from the group consisting of hydrogen, C1-C16 alkyl, aryl, C2-C16 alkenyl, C2-C16 alkynyl, heteroaryl, C3-C8 cycloalkyl, benzyl, alkylheteroaryl, halogen, halosubstituted alkyl, amino, aminoalkyl, cyano, alkoxy, hydroxyl, thiol, alkylthio, carbonyl, nitro, phosphoryl, phosphonyl, and sulfonyl; Y is selected from the group consisting of hydroxyl, halogen, oxo, alkoxy, thiol, alkylthio, amino, hydrogen, and aminoalkyl; Z is selected from the group consisting of carbon and nitrogen; R1 is selected from the group consisting of hydrogen, deuterium, C1-C16 alkyl, aryl, C2-C16 alkenyl, alkynyl, heteroaryl, C3-C8 cycloalkyl, benzyl, alkylheteroaryl, halogen, hydroxyl, and carbonyl; R2 and R3 are selected from the group consisting of hydrogen, halogen, hydroxyl, aryl, phenyl, heteroaryl, benzyl, alkylheteroaryl, carbonyl, C2-C16 alkenyl, C2-C16 alkynyl, C3-C8 cycloalkyl, and C1-C16 alkyl; and m is 1, 2, 3, or 4; or a salt thereof.