Corrosion inhibitor composition for use in the oil and gas industry
AssigneeImam Abdulrahman Bin Faisal University
InventorAeshah Hassan Saeed Alamri
Life of this patent
Estimating the term…
Abstract
A corrosion inhibitor composition is described. The corrosion inhibitor composition includes 1 to 15 weight percentage (wt. %) of a polymer having at least one vinylpyrrolidone unit and at least one vinyl acetate unit, 0.1 to 1 wt. % of a thioamide having 2 to 20 carbon atoms, 1 to 5 wt. % of a thioalcohol having 2 to 8 carbon atoms, 1 to 3 wt. % of a surfactant, 0 to 15 wt. % of an aliphatic alcohol having 1 to 8 carbon atoms, 30 to 60 wt. % of a solvent, and each wt. % based on a total weight of the corrosion inhibitor composition. The present disclosure also describes a method for inhibiting corrosion of a metal with the corrosion inhibitor composition of the present disclosure.
Claims18
A method for inhibiting corrosion of a metal in contact with a corrosive fluid, the method comprising:
- adding to a corrosive fluid the corrosion inhibitor composition in an amount of 10 to 1000 ppm based on a total number of parts by weight of the corrosive fluid,
- wherein the corrosive fluid comprises carbon dioxide and/or halides in an amount of at least 0.5 g carbon dioxide and/or halides per kg of the corrosive fluid, and
- wherein the corrosion inhibitor composition comprises:
- 1 to 15 wt % of a polymer having at least one vinylpyrrolidone unit and at least one vinyl acetate unit;
- 0.1 to 1 wt % of a thioamide having 2 to 20 carbon atoms;
- 1 to 5 wt % of a thioalcohol having 2 to 8 carbon atoms;
- 1 to 3 wt % of a surfactant;
- 0 to 15 wt % of an aliphatic alcohol having 1 to 8 carbon atoms;
- and
- 30 to 60 wt % of a solvent, each wt % based on a total weight of the corrosion inhibitor composition.
Dependencies are inferred from the claim text.