Multiple hydrophilic head corrosion inhibitors
View Patent ↗Compounds comprising multiple hydrophilic heads and a lipophilic tail may be contacted with a metal or other surface so as to adhere to the surface and inhibit corrosion, among other things. Suitable hydrophilic heads may include quaternary ammonium cation moieties, phosphonium cation moieties, and combinations thereof. Such corrosion-inhibiting compounds may be introduced into a wellbore penetrating at least a portion of a subterranean formation, for instance in oil and/or gas recovery operations and the like, whereupon the compound may adhere to a metal or other surface downhole so as to inhibit corrosion of the surface. These compounds may be employed in various other environments, such as any metal or other surface that may be exposed to corrosive conditions.
1. A method of inhibiting corrosion, the method comprising:
introducing a composition comprising a hydrophilic solvent and a corrosion-inhibiting compound into a wellbore penetrating at least a portion of a subterranean formation; and
contacting a metal surface in the wellbore with the corrosion-inhibiting compound;
wherein the corrosion-inhibiting compound has the structural formula:
wherein each of R 1 and R 2 is CH 3 and R 3 is benzyl;
wherein each of M, M′, and M″ is nitrogen;
wherein R is a C 1 to C 30 hydrocarbon chain;
wherein J is selected from the group consisting of hydrogen, a C 1 to C 6 hydrocarbon chain, and combinations thereof; and
wherein each of X, X′, and X″ is an anion selected from the group consisting of halide, carboxylate, sulfate, organic sulfonate, hydroxide, and combinations thereof.
2. The method of claim 1 further comprising increasing the hydrophobicity of the metal surface.
3. The method of claim 1 wherein the corrosion-inhibiting compound is present in a concentration of from 1 ppm to 100 ppm.
4. The method of claim 1 wherein the corrosion-inhibiting compound comprises the reaction product of a reaction process that comprises (i) a first reaction between a long-chain primary amine and an epihalohydrin, and (ii) a second reaction between the product of the first reaction with an amine selected from the group consisting of a secondary amine, a tertiary amine, and any combination thereof.
5. The method of claim 4 wherein the reaction process occurs at a temperature in a range of from 20° C. to 80° C.
6. The method of claim 1 wherein J is hydrogen.
7. The method of claim 1 wherein J is a C 1 to C 6 hydrocarbon chain.
8. The method of claim 1 wherein X is a halide.
9. The method of claim 1 wherein X″ is a halide.