Abstract: A polytriazole copolymer may include substituted phenyls, substituted benzyls, or both substituted phenyls and substituted benzyls. The substituted phenyls and the substituted benzyls may be independently substituted with hydrogen, bromo, fluoro, chloro, iodo, hydroxy, methyl, trifluoromethyl, dimethylamino, tert-butyl, carboxyl, triphenylmethyl, tris(4-fluorophenyl)methyl, tris(4-methylphenyl)methyl, (4-hydroxyphenyl)diphenylmethyl, and difluoromethoxy groups. The polytriazole copolymer may have a degree of polymerization from 25 to 250.

Abstract: In accordance with one or more embodiments of the present disclosure, a process for preventing corrosion of a metallic surface of a pipeline includes contacting the metallic surface with a corrosion inhibitor. The corrosion inhibitor comprises a polymer of formula R—O—(POL)—Z. R is a straight or branched alkyl or aryl; POL is a polyglycerol based polymer; Z is a non-ionic amine, a cyclic amine having 5 to 8 atoms, a diamine, a triamine, a tetra-amine, a polymeric amine, a thiol, a disulfide, or —NH—R1—SH; and R1 is a hydrocarbyl. The corrosion inhibitor is also disclosed.

Abstract: Corrosion inhibitor compositions and methods for inhibiting corrosion on a metal surface exposed to a hydrocarbon fluid are provided. The corrosion inhibition compositions can include a corrosion inhibitor, such as 3-dimethylamino benzoic acid, 4-dimethylamino benzoic acid, or 2,5-dihydroxyterephthalic acid. The corrosion inhibitor composition can further comprise dimethyl sulfoxide, and heavy aromatic naphtha. The corrosion inhibitor composition can be phosphate-free and can inhibit naphthenic acid corrosion. In the methods, a corrosion inhibitor composition is added to the hydrocarbon fluid exposed to the metal surface to prevent or inhibit corrosion on the metal surface, including naphthenic acid corrosion.

Abstract: Corrosion inhibitor compositions and methods for inhibiting corrosion on a metal surface exposed to a hydrocarbon fluid are provided. The corrosion inhibition compositions can include a corrosion inhibitor, such as 3-dimethylamino benzoic acid, 4-dimethylamino benzoic acid, or 2,5-dihydroxyterephthalic acid. The corrosion inhibitor composition can further comprise dimethyl sulfoxide, and heavy aromatic naphtha. The corrosion inhibitor composition can be phosphate-free and can inhibit naphthenic acid corrosion. In the methods, a corrosion inhibitor composition is added to the hydrocarbon fluid exposed to the metal surface to prevent or inhibit corrosion on the metal surface, including naphthenic acid corrosion.

Abstract: Corrosion inhibitor compositions and methods for inhibiting corrosion on a metal surface exposed to a hydrocarbon fluid are provided. The corrosion inhibitor composition can comprise 2-aminoterephthalic acid, dimethyl sulfoxide and heavy aromatic naphtha (HAN). In another embodiment, the composition can comprise 4-methylamino benzoic acid or 4-methylsulfonyl benzoic acid, N-methyl pyrrolidone, and HAN. In the method, a corrosion inhibitor composition comprising 2-aminoterephthalic acid, 4-methylamino benzoic acid, or 4-methylsulfonyl benzoic acid can be added to a hydrocarbon fluid exposed to the metal surface. The corrosion can be caused by naphthenic acid.

Abstract: A system, an apparatus and a method for simulating and assessing a damaged corrosion film in a pipe segment for pitting corrosion potential under field conditions, including variations in cathode to anode ratios. The apparatus has an anode case that holds a working electrode, a first body portion attachable to one end of the pipe segment, and a second body portion attachable to another end of the pipe segment, the first and second body portions defining a corrosion simulation cell. The anode case can be contained within the corrosion simulation cell, and the working electrode can include a test matrix.

Abstract: An electrochemical system for measuring the repassivation kinetics of a metallic material under sour oil field conditions comprises a housing made of the metallic material surrounding an internal space; insulating covers positioned on the housing, an electrolyte enclosed within the internal space of the housing and the insulating covers, a scratch tool including a second housing made of an insulting material that one end positioned in the electrolyte, a sample holder for holding a sample composed of the metallic material, and a pin tip positioned to scratch off a passivation film from the sample surface, and an electrical power source coupled to the housing and the sample within the scratch tool so as to generate an electric current between the housing and the sample, wherein the sample holder is movable with respect to the pin tip to create a scratch on the sample within the electrolyte.