COMPOSITIONS AND METHODS FOR METAL WEAR LOSS INHIBITION
Methods for reducing, inhibiting or preventing both corrosion and metal wear inhibition of metal surfaces used in recovery, transportation, refining or storage of a hydrocarbon fluids are provided.
1 . A method of reducing, inhibiting or preventing both corrosion and metal wear inhibition of a metal surface comprising:
contacting a metal surface with a corrosion and metal wear inhibiting composition to reduce, inhibit or prevent both corrosion and metal wear of the metal surface,
wherein the corrosion and metal wear inhibiting composition comprises:
from about 2 wt-% to about 40 wt-% a carboxylic acid, a salt of a fatty acid amine condensate, and/or an alkanolamine or salt thereof,
from about 1 wt-% to about 15 wt-% of an organic sulfur compound and/or an organic sulfonic acid amine, and
from about 50 wt-% to about 90 wt-% of a solvent, and
wherein the metal surface is used in recovery, transportation, refining or storage of a hydrocarbon fluid.
2 . The method of claim 1 , wherein the corrosion and metal wear inhibiting composition is added to the hydrocarbon fluid at a continuous concentration of about 50 to about 5,000 ppm, or as a direct batch application to fully coat the metal surface at a concentration of about 5,000 ppm to about 1,000,000 ppm.
3 . The method of claim 3 , wherein the corrosion and metal wear inhibiting composition is added to the hydrocarbon fluid before the hydrocarbon fluid contacts the metal surface.
4 . The method of claim 1 , wherein the hydrocarbon fluid
comprises crude oil, heavy oil, processed residual oil, bituminous oil, coker oils, coker gas oils, fluid catalytic cracker feeds, gas oil, naphtha, fluid catalytic cracking slurry, diesel fuel, fuel oil, jet fuel, gasoline, kerosene, or combinations thereof.
5 . The method of claim 4 , wherein the hydrocarbon fluid is a refined hydrocarbon product.
6 . The method of claim 1 , wherein the metal surface comprises carbon steel.
7 . The method of claim 1 , wherein the metal surface used in recovery, transportation, refining or storage of the hydrocarbon fluid is under elevated carbon dioxide and elevated hydrogen sulfide causing high levels of metal loss and corrosion.
8 . The method of claim 1 , wherein the reduction, inhibition or prevention of metal wear provides a lubrication to the metal surface.
9 . The method of claim 1 , wherein the salt of the fatty acid amine condensate is a carboxylic acid-polyamine condensate.
10 . The method of claim 9 , wherein the carboxylic acid-polyamine condensate is an imidazoline.
11 . The method of claim 1 , wherein the salt of the fatty acid amine condensate is a reaction product of (1) a polyunsaturated fatty acid dimer, (2) a sulfonic acid compound, and (3) a reaction product of a polyalkylene polyamine, a tall oil fatty acid, and a polyunsaturated fatty acid dimer.
12 . The method of claim 11 , wherein the polyunsaturated fatty acid dimer comprises a linoleic acid dimer and the sulfonic acid compound comprises a linear alkyl benzene sulfonic acid.
13 . The method of claim 1 , wherein the alkanolamine salt is a dicarboxylic acid diethanolamine salt.
14 . The method of claim 1 , wherein the organic sulfur compound comprises a mercaptoalkyl alcohol, and wherein the solvent comprises water and/or an aromatic solvent.
15 . The method of claim 1 , wherein the corrosion and metal wear inhibiting composition further comprises one or more additives selected from the group consisting of additional corrosion inhibitors, corrosion inhibitor intensifiers, pH control additives, surfactants, gas hydrate inhibitors, scale inhibitors, clay stabilizers, bactericides, biocides, salt substitutes, relative permeability modifiers, hydrogen sulfide scavengers, oxygen scavengers, breakers, fluid loss control additives, asphaltene inhibitors, paraffin inhibitors, chelating agents, foaming agents, defoamers, emulsifiers, demulsifiers, iron control agents, friction reducers, drag reducing agents, flow improvers, viscosity reducers, solvents, and combinations thereof.
16 . The method of claim 15 , wherein the one or more additives is a substituted aromatic amine, a phosphoric acid ester, a quaternary ammonium compound, a solvent stabilizer compound comprising a glycol ether, a demulsifier comprising an oxyalkylate polymer, dodecylbenzylsulfonic acid, a salt of xylene sulfonic acid, epoxylated/propoxylated compound, phenolic and epoxide resin, or combinations thereof, at least one surfactant, or combinations thereof.
17 . The method of claim 16 , wherein the at least one surfactant comprises a cationic surfactant that is an alkoxylated alkyl amine and/or a quaternary ammonium compound, an anionic surfactant, a nonionic surfactant, or combinations thereof.
18 . The method of claim 1 , wherein the corrosion and metal wear inhibiting composition is substantially free of or free of pyrazine corrosion inhibitors.
19 . The method of claim 1 , wherein the method provides at least about a 25% wear metal loss rate reduction and wear-corrosion metal loss rate reduction.
20 . The method of claim 19 , wherein the method provides at least about a 50% wear metal loss rate reduction and wear-corrosion metal loss rate reduction.