Composition and method for corrosion inhibition utilizing an epoxy resin, an amine curing agent, an alcohol and optionally a hydrocarbon diluent
AssigneePhillips Petroleum Company
InventorYulin Wu
Life of this patent
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Abstract
A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.
Claims13
A method for treating a metal surface to inhibit corrosion thereof, comprising contacting the metal surface with a composition comprising:
- (a) an epoxy resin;
- (b) an amine curing agent selected from the group consisting of N-coco-1,3 diaminopropane, tallowamine, octylamine, dodecylamine, hexadecylamine, oleyamine, soyaamine, dicocoamine, dihydrogenated tallowamine, and cocoamine wherein an equivalent ratio of curing agent to epoxy resin of greater than shout 1.5:
- 1 to about 5:1 exists;
- (c) an aromatic hydrocarbon diluent present in at least an amount sufficient to maintain the composition in an essentially fluid state;
- and
- (d) an alcohol selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol and combinations of any two or more thereof, wherein said alcohol is present in an amount of about 10 to about 60 weight percent of the composition and wherein said composition is contacted with the metal surface for a time sufficient to form a corrosion-inhibiting film thereon.
Dependencies are inferred from the claim text.