Corrosion inhibitor compositions and methods of inhibiting corrosion

Abstract

The disclosure provides a composition including a corrosion inhibitor compound and a synergist. The composition may be used in a method of inhibiting corrosion of a metal surface. The method includes adding the composition to an aqueous medium that includes the metal surface and/or adding the compound and/or polymer directly to the metal surface. The composition may be applied to the metal surface, for example, using batch treatment and/or continuous injection. Examples of synergists include a lignin polymer, polyvinyl alcohol, cellulose, gelatin, or a combination thereof.

What is claimed is: 
     
         1 . A method of inhibiting corrosion of a metal surface in contact with a medium, comprising:
 adding a corrosion inhibitor compound to the medium, and   adding a synergist to the medium, wherein the synergist is selected from the group consisting of a lignin polymer, a polyvinyl alcohol, cellulose, gelatin, and any combination thereof.   
     
     
         2 . The method of  claim 1 , further comprising adding the corrosion inhibitor compound before, after, and/or with the synergist. 
     
     
         3 . The method of  claim 1 , wherein the corrosion inhibitor compound and the synergist are added simultaneously and/or sequentially. 
     
     
         4 . The method of  claim 1 , wherein the corrosion inhibitor compound and the synergist are added at the same location or at different locations in the medium. 
     
     
         5 . The method of  claim 1 , further comprising adding the corrosion inhibitor compound and/or the synergist to the metal surface in the absence of the medium. 
     
     
         6 . The method of  claim 1 , wherein the corrosion inhibitor compound comprises an amine compound, a polyamine compound, a thiol-containing compound, a carboxylic acid, a dicarboxylic acid, mercaptoethanol, a maleated compound, an aromatic amine compound, a phosphate ester, a quaternary ammonium compound, an imidazoline compound, or any combination thereof, optionally wherein the polyamine compound comprises a diamine compound, a triamine compound, and/or a quaternary ammonium compound. 
     
     
         7 . The method of  claim 6 , wherein the polyamine compound is an alkyl quaternary salt, a hydroxyalkyl quaternary salt, an alkylaryl quaternary salt, an arylalkyl quaternary salt, or an arylamine quaternary salt. 
     
     
         8 . The method of  claim 1 , wherein the medium comprises produced water, fresh water, recycled water, salt water, surface water, condensed water, cooling water, injection water, waste water, geothermal water, sewage water, nuclear cooling water, carbon dioxide, hydrogen, or any mixture thereof. 
     
     
         9 . The method of  claim 1 , further comprising adding from about 0.1 ppm to about 10,000 ppm of the corrosion inhibitor compound to the medium and/or from about 0.1 ppm to about 5,000 ppm of the synergist to the medium. 
     
     
         10 . The method of  claim 1 , wherein the corrosion inhibitor compound and/or the synergist comprise a solvent selected from the group consisting of water, a C 1 -C 6  alkanol, a C 1 -C 6  alkoxyalkanol, an alcohol, a glycol ether, a hydrocarbon, a ketone, an ether, an aromatic, an alkylene glycol, an amide, a nitrile, a sulfoxide, an ester, and any combination thereof. 
     
     
         11 . The method of  claim 1 , wherein one or more of a pipeline, a flowline, a downhole tubular, a casing, a tank, or a separator comprises the metal surface. 
     
     
         12 . The method of  claim 1 , wherein a composition comprises the corrosion inhibitor compound and the synergist, wherein the composition comprises from about 0.1 wt. % to about 25 wt. % of the synergist and/or from about 1 wt. % to about 99 wt. % of the corrosion inhibitor compound. 
     
     
         13 . The method of  claim 1 , further comprising adding to the medium an additional component selected from the group consisting of a fouling control agent, an additional corrosion inhibitor, a biocide, a preservative, an acid, an anti-emulsifier, an iron chelating agent, a hydrogen sulfide scavenger, a surfactant, an asphaltene inhibitor, a paraffin inhibitor, a scale inhibitor, a gas hydrate inhibitor, a pH modifier, an emulsion breaker, a reverse emulsion breaker, a coagulant/flocculant agent, an emulsifier, a water clarifier, a dispersant, an antioxidant, a polymer degradation prevention agent, a permeability modifier, a foaming agent, an antifoaming agent, a CO 2  scavenger, an O 2  scavenger, a gelling agent, a lubricant, a friction reducing agent, a salt, and any combination thereof. 
     
     
         14 . The method of  claim 1 , wherein the cellulose is selected from the group consisting of macrocellulose, microcellulose, nanocellulose, and any combination thereof. 
     
     
         15 . A composition, comprising:
 a corrosion inhibitor compound and a synergist, wherein the synergist is selected from the group consisting of a lignin polymer, polyvinyl alcohol, cellulose, gelatin, and any combination thereof.   
     
     
         16 . The composition of  claim 15 , further comprising a medium selected from the group consisting of produced water, fresh water, recycled water, salt water, surface water, condensed water, cooling water, injection water, waste water, geothermal water, sewage water, nuclear cooling water, carbon dioxide, hydrogen, and any combination thereof. 
     
     
         17 . The composition of  claim 15 , wherein the corrosion inhibitor compound comprises an amine compound, a polyamine compound, a thiol-containing compound, a carboxylic acid, a dicarboxylic acid, mercaptoethanol, a maleated compound, an aromatic amine compound, a phosphate ester, a quaternary ammonium compound, an imidazoline compound, or any combination thereof. 
     
     
         18 . The composition of  claim 15 , further comprising a solvent selected from the group consisting of water, a C 1 -C 6  alkanol, a C 1 -C 6  alkoxyalkanol, an alcohol, a glycol ether, a hydrocarbon, a ketone, an ether, an aromatic, an alkylene glycol, an amide, a nitrile, a sulfoxide, an ester, and any combination thereof. 
     
     
         19 . The composition of  claim 15 , further comprising an additional component selected from the group consisting of a fouling control agent, an additional corrosion inhibitor, a biocide, a preservative, an acid, an anti-emulsifier, an iron chelating agent, a hydrogen sulfide scavenger, a surfactant, an asphaltene inhibitor, a paraffin inhibitor, a scale inhibitor, a gas hydrate inhibitor, a pH modifier, an emulsion breaker, a reverse emulsion breaker, a coagulant/flocculant agent, an emulsifier, a water clarifier, a dispersant, an antioxidant, a polymer degradation prevention agent, a permeability modifier, a foaming agent, an antifoaming agent, a CO 2  scavenger, an O 2  scavenger, a gelling agent, a lubricant, a friction reducing agent, a salt, and any combination thereof. 
     
     
         20 . A metal surface comprising the composition of  claim 15 .