A corrosion inhibition composition includes a carrier and a Schiff base in admixture with the carrier. The carrier includes at least one of water, a hydrocarbon solvent, and a binder.

A method of inhibiting sour corrosion of a metal surface including contacting the metal surface and composition in a corrosive medium. The corrosive medium includes hydrogen sulfide. The composition includes an aliphatic alcohol comprising 1 to 6 carbons, a polysorbate, a glycol compound, and a substituted benzimidazole compound. The composition includes a weight ratio of the substituted benzimidazole compound to the polysorbate of 1 to 3.

In one aspect, provided is an etchant composition that is able to reduce etching nonuniformity.

An aspect of the present disclosure relates to an etchant composition for etching of a layer to be etched that contains at least one metal. The etchant composition contains an etching inhibitor, an acid including at least a nitric acid, and water and has a pH of 1 or less. The etching inhibitor is at least one nitrogen-containing compound selected from the group consisting of polyalkyleneimine and a polymer having a constitutional unit derived from diallylamine.

The present disclosure relates to an aqueous formulation of an oil-soluble corrosion inhibitor, and a preparation method and a regeneration method thereof. The preparation method comprises the following steps: (1) obtaining the temperature T at which the conductivity of the aqueous formulation of the oil-soluble corrosion inhibitor is decreased to no higher than 100 s/cm; (2) gradually adding water dropwise to a corrosion inhibitor stock solution, which is obtained by mixing the oil-soluble corrosion inhibitor and a solvent oil homogeneously, to produce a reverse micelle liquid A, and then heating up the reverse micelle liquid A to the temperature T and maintaining at this temperature; (3) mixing a non-ionic surfactant, an anionic surfactant and water homogeneously to obtain a mixture solution B, and heating up the mixture solution B to the temperature T and maintaining at this temperature; and (4) mixing the reverse micelle liquid A and the mixture solution B homogeneously, and stirring it at the temperature T for no more than 2 minutes before immediately cooling it, to obtain the aqueous formulation of the oil-soluble corrosion inhibitor. The aqueous formulation of the oil-soluble corrosion inhibitor produced by the method is easy to produce, simple to use and extremely stable.

Compounds comprising multiple hydrophilic heads and a lipophilic tail may be contacted with a metal or other surface so as to adhere to the surface and inhibit corrosion, among other things. Suitable hydrophilic heads may include quaternary ammonium cation moieties, phosphonium cation moieties, and combinations thereof. Such corrosion-inhibiting compounds may be introduced into a wellbore penetrating at least a portion of a subterranean formation, for instance in oil and/or gas recovery operations and the like, whereupon the compound may adhere to a metal or other surface downhole so as to inhibit corrosion of the surface. These compounds may be employed in various other environments, such as any metal or other surface that may be exposed to corrosive conditions.

Compounds comprising multiple hydrophilic heads and a lipophilic tail may be contacted with a metal or other surface so as to adhere to the surface and inhibit corrosion, among other things. Suitable hydrophilic heads may include quaternary ammonium cation moieties, phosphonium cation moieties, and combinations thereof. Such corrosion-inhibiting compounds may be introduced into a wellbore penetrating at least a portion of a subterranean formation, for instance in oil and/or gas recovery operations and the like, whereupon the compound may adhere to a metal or other surface downhole so as to inhibit corrosion of the surface. These compounds may be employed in various other environments, such as any metal or other surface that may be exposed to corrosive conditions.

Compositions and methods for inhibiting corrosion of metal surfaces are disclosed herein. Also disclosed are methods of manufacturing the corrosion inhibitors compositions. The corrosion inhibitor compositions include a reaction product of maleated fatty imidazoline formed from a fatty acid, e.g., maleated tall oil fatty acid and/or a maleated soya acid, with one or more amines. The reaction product can be further reacted with one or more of acrylic acid or acetic acid to form derivatives of a maleated fatty imidazoline acrylate compound or a maleated fatty imidazoline acetate compound, respectively.

A corrosion inhibition composition includes a carrier fluid and corrosion inhibitor consisting essentially of a compound represented by Formula (I): ##STR00001## where R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, where R.sub.5 and R.sub.6 are each, independently, a saturated C.sub.6-C.sub.10 hydrocarbon group or an unsaturated C.sub.6-C.sub.10 hydrocarbon group. A method of producing a corrosion inhibition composition consisting essentially of an ethoxylated diamine corrosion inhibitor and a carrier fluid and a method for inhibiting corrosion in a refined hydrocarbon-bearing system are also described.

A corrosion inhibition composition includes a carrier fluid and corrosion inhibitor consisting essentially of a compound represented by Formula (I):

##STR00001##

where R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, where R.sub.5 and R.sub.6 are each, independently, a saturated C.sub.6-C.sub.10 hydrocarbon group or an unsaturated C.sub.6-C.sub.10 hydrocarbon group. A method of producing a corrosion inhibition composition consisting essentially of an ethoxylated diamine corrosion inhibitor and a carrier fluid and a method for inhibiting corrosion in a refined hydrocarbon-bearing system are also described.

The present disclosure relates to substrates and methods of producing substrates thereof. The substrates have a metal substrate and treated with a deoxidizer prior to having a sol-gel coating disposed on the metal substrate. The sol-gel coating includes about 3 wt % to about 15 wt % by volume of an organic corrosion inhibitor to the sol-gel. Methods of applying the sol-gel coating are also disclosed.