Compositions are described for protecting a metal surface against corrosion. The composition includes a corrosion-inhibiting particle. The corrosion inhibiting particle may be usable in an epoxy resin-based coating or an olefin resin-based coating. The particle may include a core and a protectant. The core may include a water soluble corrosion inhibitor. The protectant may be disposed on at least a portion of a surface of the core and may be covalently or ionically bonded to a thiol group of the corrosion inhibitor. The protectant may be configured to reduce reaction between the core and the epoxy resin or the olefin resin. Methods of making the compositions are also disclosed.

A corrosion inhibiting composition includes a first plurality of carriers and a second plurality of carriers. The first plurality of carriers has a first carrier body which encapsulates a film-forming compound. The second plurality of carriers has a second carrier body encapsulates a corrosion inhibitor. Each of the first and second carrier bodies is formed of a degradable material. Coatings and methods for inhibiting corrosion on a metal substrate are also described herein.

A method of inhibiting corrosion of metal in contact with a corrosive mixture in an oil or gas field environment involving introducing a corrosion inhibitor composition into the corrosive mixture, the corrosion inhibitor composition including a nitrogen-containing compound having an alkyl amine group or an alkyl quaternary ammonium salt group, and at least one sulfur-containing compound selected from the group consisting of mercaptobenzothiazole, mercaptobenzoimidazole, a thioglycol compound, and a thiourea compound.

Heterocyclic compounds having fused pyrimidine moieties with electron-donating groups. A method of preparing the heterocyclic compounds via a multicomponent condensation reaction is specified. These compounds are effective against corrosion of metallic substrates in acidic (i.e. CO.sub.2), and high salinity environments commonly found in oil and gas industry.

The present invention concerns the use of at least one compound A comprising at least one —SH or —S—, M+group, at least one —C-G-C— chain, in which G represents an atom from column 16 of the periodic table, not comprising a carboxy group —C(═O)—OH or —C(═O)—O—, and of a molar mass of between 90 g.Math.mol-1 and 1000 g.Math.mol-1, as an additive in a formulation inhibiting corrosion in metals used in the oil industry, and more generally in any kind of industry involving the drilling of ores or fossil compounds, such as gas or oil, in order to improve both the anti-corrosion performance and the storage stability of same. The invention also concerns said corrosion-inhibiting formulations comprising at least one compound A.

The present disclosure relates to agents, compositions, and methods for inhibiting corrosion in various substrates, for example in metal substrates. The present disclosure also relates to compositions for inhibiting corrosion comprising at least one organic heterocyclic compound and at least one metal salt or mixed metal salt selected from rare earth, alkali earth and transition metals.

The present invention concerns the use of at least one compound A comprising at least one SH or S.sup., M.sup.+ group, at least one C-G-C chain, in which G represents an atom from column 16 of the periodic table, not comprising a carboxy group C(O)OH or C(O)O.sup., and of a molar mass of between 90 g.Math.mol.sup.1 and 1000 g.Math.mol.sup.1, as an additive in a formulation inhibiting corrosion in metals used in the oil industry, and more generally in any kind of industry involving the drilling of ores or fossil compounds, such as gas or oil, in order to improve both the anti-corrosion performance and the storage stability of same. The invention also concerns said corrosion-inhibiting formulations comprising at least one compound A.

Disclosed are molybdenum-containing complexes used in compositions and methods for inhibiting or reducing high temperature corrosion in petroleum refineries.

According to one embodiment of the present disclosure, a method of forming an ultraviolet-stabilized corrosion inhibitor is provided. The method includes forming a functionalized azole; forming a functionalized photosensitizer; and forming an ultraviolet-stabilized corrosion inhibitor by reacting the functionalized azole with the functionalized photosensitizer. In another embodiment, an ultraviolet-stabilized corrosion inhibitor is provided. The inhibitor includes an azole bonded to a photosensitizer. In another embodiment, an article of manufacture is provided. The article of manufacture includes a material comprising a reaction product of an azole and a photosensitizer.

The present disclosure is directed to methods, systems and apparatuses for predictively selecting plant extracts for their inclusion in formulations to imparting anti-corrosion properties to coatings for aluminum, aluminum alloys, copper and copper alloys.