A water soluble metalworking concentrate is a combination of one or more amines; one or more ferrous corrosion inhibitors; one or more phosphate esters; one or more ether carboxylates; a ricinoleic acid condensate; one or more lubricating agents; deionized water and, optionally, one or more non-ferrous corrosion inhibitors. In use, the concentrate is diluted to a concentration of approximately 5% to approximately 10%. In use, the metalworking fluid exhibits excellent lubricity, low foam generation, emulsion stability, protection of ferrous and non-ferrous metals, biostatic stability and environmental compatibility.

A corrosion inhibitor active and method for reducing corrosion of a metal surface in contact with a corrosive environment is disclosed. The corrosion inhibitor active is an organic sulfonated compound that is derived from the sulfonation of one or more carboxylic acids, internal olefins, or alpha-olefins having a carbon chain length of 15 to 26 carbon atoms. The method of reducing corrosion includes contacting the metal surface with an effective amount of the corrosion inhibitor active. The corrosion inhibitor active is useful in high temperature corrosive environments, such as those found in oil and gas operations.

A corrosion inhibitor active and method for reducing corrosion of a metal surface in contact with a corrosive environment is disclosed. The corrosion inhibitor active is an organic sulfonated compound that is derived from the sulfonation of one or more carboxylic acids, internal olefins, or alpha-olefins having a carbon chain length of 15 to 26 carbon atoms. The method of reducing corrosion includes contacting the metal surface with an effective amount of the corrosion inhibitor active. The corrosion inhibitor active is useful in high temperature corrosive environments, such as those found in oil and gas operations.

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.

Compositions and methods are provided for reducing, inhibiting, or preventing corrosion of a surface, the method comprising contacting an anticorrosion compound of Formula 1 with the surface, the anticorrosion compound of Formula 1 having a structure corresponding to:

##STR00001##

wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are independently selected from hydrogen, hydroxyl, alkyl, alkoxyl, aryl, alkaryl, aralkyl, and —NR.sup.8R.sup.9; R.sup.6 and R.sup.7 are independently hydrogen, a substituted alkyl, substituted alkenyl, substituted aryl, substituted alkaryl, or substituted aralkyl, wherein at least one substituent is a hydroxyl or an ether; provided that at least one of R.sup.6 and R.sup.7 is other than hydrogen; Fe and R.sup.9 are independently hydrogen, unsubstituted alkyl, unsubstituted alkenyl, unsubstituted aryl, unsubstituted alkaryl, unsubstituted aralkyl, substituted alkyl, substituted alkenyl, or substituted alkaryl, wherein at least one substituent is a hydroxyl or an ether; or any two adjacent groups of R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 form one or more ring structures.

A corrosion inhibitor has a film-forming portion. In one embodiment, the corrosion inhibitor further includes a surfactant, a coupling solvent and a carrier solvent. In another embodiment, the corrosion inhibitor has a film-forming portion that includes at least two multi-dentate compounds and a compound having a single active group. Each of the multi-dentate compounds and the compound having a single active group are selected from the group consisting of compounds having nitrogen-containing polar groups, compounds having acid groups and combinations thereof.

Oil well pipe component comprising a threaded portion, at least part whereof is coated with a layer of a corrosion-inhibiting material, that has been applied to at least the part of the threaded portion of the oil well pipe component by means of a method comprising a cataphoresis step from an aqueous bath, said method comprising providing the oil well pipe component comprising a threaded portion; immersing at least part of the threaded portion of the pipe component in a cataphoresis bath comprising water and suspended particles of corrosion-inhibiting material, and provided with an anode and a cathode means, the pipe component being connected to the cathode means; inducing a current through the bath, in order to provide the corrosion-inhibiting material with a positive charge; depositing a layer of the positively charged corrosion-inhibiting material onto the pipe component; and removing the immersed part of the pipe component with the layer of corrosion-inhibiting material from the cataphoresis bath and allowing the corrosion-inhibiting material to set.

Oil well pipe component comprising a threaded portion, at least part whereof is coated with a layer of a corrosion-inhibiting material, that has been applied to at least the part of the threaded portion of the oil well pipe component by means of a method comprising a cataphoresis step from an aqueous bath, said method comprising providing the oil well pipe component comprising a threaded portion; immersing at least part of the threaded portion of the pipe component in a cataphoresis bath comprising water and suspended particles of corrosion-inhibiting material, and provided with an anode and a cathode means, the pipe component being connected to the cathode means; inducing a current through the bath, in order to provide the corrosion-inhibiting material with a positive charge; depositing a layer of the positively charged corrosion-inhibiting material onto the pipe component; and removing the immersed part of the pipe component with the layer of corrosion-inhibiting material from the cataphoresis bath and allowing the corrosion-inhibiting material to set.

The present disclosure provides a formulation and methods for simultaneously dissolving metal sulfide scales, inhibiting acid gas corrosion, and inhibiting the formation of calcite and barite in a system having low or high shear stress conditions due to fluid movement, in which the formulation contains a THP+salt, one or more corrosion inhibitors, one or more scale inhibitors, and one or more acid corrosion inhibitors. The formulation may be applied to the system in diluted or undiluted form, and continuously or in batch style.

The present disclosure provides a formulation and methods for simultaneously dissolving metal sulfide scales, inhibiting acid gas corrosion, and inhibiting the formation of calcite and barite in a system having low or high shear stress conditions due to fluid movement, in which the formulation contains a THP+salt, one or more corrosion inhibitors, one or more scale inhibitors, and one or more acid corrosion inhibitors. The formulation may be applied to the system in diluted or undiluted form, and continuously or in batch style.