Use of di-ionic compounds as corrosion inhibitors in a water system
AssigneeEcolab USA Inc.
InventorsAshish Dhawan, Jeremy Moloney, Carter M. Silvernail, Boyd A. Laurent
Life of this patent
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Abstract
Disclosed herein are the methods of using di-cationic or di-anionic compounds, which are derived from primary amine through an aza-Michael addition with an activated olefin, in a corrosion control composition to mitigate corrosion of a surface in a water system. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for mitigating corrosion for a metal surface in water systems.
Claims19
A method of for inhibiting corrosion at a surface in a water system comprising:
- providing a corrosion control composition or a use solution of the corrosion control composition into a water system to generate a treated water system or onto a surface of the water system,
- wherein the corrosion control composition comprises one or more compounds according to Formula III and one or more additional corrosion control composition agents,
- wherein:
- R11 is R1 or R1—Z—(CH2)m—;
- R1 is an unsubstituted or substituted, linear or branched C5-C30 alkyl, cyclic alkyl, alkenyl, or alkynyl group;
- Z is NH or O;
- Y′ is —SO3H, —PO3H, —OSO3H, —OPO3H, or a salt thereof;
- R2′ is H, CH3, or an unsubstituted or substituted, linear or branched C1-C10 alkyl, alkenyl, alkynyl group, —COOH, —CH2COOH, Y′, or —(CH2)m—Y′;
- and
- m is an integer of 1 to 4,
- wherein the corrosion control composition mitigates corrosion on the surface in the water system.
A corrosion control composition comprising one or more compounds according to Formula III and one or more additional corrosion control composition agents,
- wherein:
- R11 is R1 or R1—Z—(CH2)m—;
- R1 is an unsubstituted or substituted, linear or branched C5-C30 alkyl, cyclic alkyl, alkenyl, or alkynyl group;
- Z is NH or O;
- Y′ is —SO3H, —PO3H, —OSO3H, —OPO3H, or a salt thereof;
- R2′ is H, CH3, or an unsubstituted or substituted, linear or branched C1-C10 alkyl, alkenyl, alkynyl group, —COOH, —CH2COOH, Y′, or —(CH2)m—Y′;
- and
- m is an integer of 1 to 4,
- wherein the corrosion control composition mitigates corrosion on the surface in the water system.
Dependencies are inferred from the claim text.