Corrosion inhibitor compositions that include silica nanoparticles, a quaternary ammonium compound, an imidazoline derivative, and an organic sulfur compound. The silica nanoparticles can be functionalized with an organosilane. A method includes introducing, adding, or injecting the corrosion inhibitor composition into a fluid to inhibit corrosion on a metal surface that is in contact with the fluid.

Corrosion inhibitor compositions that include silica nanoparticles, a quaternary ammonium compound, an imidazoline derivative, and an organic sulfur compound. The silica nanoparticles can be functionalized with an organosilane. A method includes introducing, adding, or injecting the corrosion inhibitor composition into a fluid to inhibit corrosion on a metal surface that is in contact with the fluid.

Disclosed herein are sulfur-functional corrosion inhibitors that are adducts of a cyclic anhydride with 2-mercaptoethanol. Concentrates of the sulfur-functional corrosion inhibitors do not degrade to form H.sub.2S under standard storage conditions for a period of up to 5 years. Also disclosed herein are treated water sources and treated metal containments including one or more sulfur-functional corrosion inhibitors. The sulfur-functional corrosion inhibitors inhibit corrosion of metal containments contacted with one or more water sources, wherein the one or more water sources comprise one or more corrodents. The sulfur-functional corrosion inhibitors are as effective or more effective at inhibiting corrosion than conventional sulfur-based corrosion inhibitors when compared on a weight or a volume basis.

Disclosed herein are sulfur-functional corrosion inhibitors that are adducts of a cyclic anhydride with 2-mercaptoethanol. Concentrates of the sulfur-functional corrosion inhibitors do not degrade to form H.sub.2S under standard storage conditions for a period of up to 5 years. Also disclosed herein are treated water sources and treated metal containments including one or more sulfur-functional corrosion inhibitors. The sulfur-functional corrosion inhibitors inhibit corrosion of metal containments contacted with one or more water sources, wherein the one or more water sources comprise one or more corrodents. The sulfur-functional corrosion inhibitors are as effective or more effective at inhibiting corrosion than conventional sulfur-based corrosion inhibitors when compared on a weight or a volume basis.

An inhibitor composition contains alkyl thiophosphoric triamide (or a mixture of alkyl thiophosphoric triamide and dicyandiamide),dissolved in a liquid medium comprising at least one organic solvent, at least one amine stabilizer and, optionally, at least one dye and/or at least one odor masking agent, is useful in making fertilizer compositions and in a method of fertilizing target plants.

The present disclosure provides a method for preventing corrosion capable of sufficiently protecting a surface of an aluminum-based member (in particular, a contact surface with a gasket) from corrosion, particularly when the surface of the aluminum-based member is sealed by the gasket. The method for preventing corrosion of a surface of an aluminum-based member constituting a structure that sandwiches the gasket together with another member in a press contact state, wherein a surfactant is made to adhere to the surface of the aluminum-based member.

The present disclosure provides a method for preventing corrosion capable of sufficiently protecting a surface of an aluminum-based member (in particular, a contact surface with a gasket) from corrosion, particularly when the surface of the aluminum-based member is sealed by the gasket. The method for preventing corrosion of a surface of an aluminum-based member constituting a structure that sandwiches the gasket together with another member in a press contact state, wherein a surfactant is made to adhere to the surface of the aluminum-based member.

Provided are methods and compositions for inhibiting carbonyl based fouling materials of basic wash systems. Said methods comprise contacting the hydrocarbon stream that is or will be subjected to said wash systems with water soluble or water dispersible copolymers. Said copolymers comprise repeat units of ethylenically unsaturated monomers such as acrylic acid with other repeat units such as alkyl acrylates, allyl ethers, ethoxylated allyl repeat units, etc. In other embodiments, a third repeat unit is present and may comprise a hydrophobic moiety such as a styrene repeat unit.

Provided are methods and compositions for inhibiting carbonyl based fouling materials of basic wash systems. Said methods comprise contacting the hydrocarbon stream that is or will be subjected to said wash systems with water soluble or water dispersible copolymers. Said copolymers comprise repeat units of ethylenically unsaturated monomers such as acrylic acid with other repeat units such as alkyl acrylates, allyl ethers, ethoxylated allyl repeat units, etc. In other embodiments, a third repeat unit is present and may comprise a hydrophobic moiety such as a styrene repeat unit.

The present invention generally relates to compositions and methods for inhibiting corrosion at a surface in the production, transportation, storage, and separation of crude oil and natural gas.