A process for preventing the formation of white rust on a steel surface at least partially coated with zinc includes a) bringing said surface, preferably under thermal load, into contact with an aqueous composition, the pH of which is between 6.5 and 8.5 comprising at least one organic acid of formula:

RXOH (I) wherein X represents C(O) or S(O)2, and R represents an organic chain. A composition and also to a cooling tower treated by the process are provided.

Disclosed are inhibitor/cleaner compositions comprising alkyldiphenyloxide disulfonates, and methods of inhibiting corrosion of and removing schmoo from metal containments in contact with corrosive water sources. Also disclosed are metal containment assemblages comprising inhibitor/cleaner compositions and metal containment therefore. The alkyldiphenyloxide disulfonates are soluble or substantially soluble in the water sources and inhibit corrosion of the metal containments by the water sources containing corrodents. The alkyldiphenyloxide disulfonates also remove schmoo from the metal containments. The inhibitor/cleaners of the invention are useful for addition to produced waters and other corrosive water sources resulting from enhanced oil recovery operations. The inhibitor/cleaners inhibit corrosion of tanks, devices, and other metal containments such as carbon steel pipes which come into contact with produced waters from the oil recovery operations, while also providing schmoo reduction and removal from the metal containments. The inhibitor cleaners are also useful for addition to other corrosive aqueous fluids to inhibit corrosion of metal containments with which the aqueous fluids come into contact, such as corrosive aqueous discharge from mines and other industrial operations such as paper-making.

Method of minimizing pitting corrosion at temperatures above 130 C., wherein said method comprises: providing an acidic fluid comprising an alkylsulfonic acid; providing at least one corrosion inhibitor compound comprising an organic compound comprising at least two aldehyde functional groups; combining said acidic fluid with said at least one corrosion inhibitor compound; exposing said mixed fluid to a metallic surface at a temperature of at least 130 C.; and allowing said mixed fluid sufficient time of exposure to a metal to accomplish a pre-determined function.

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.

The present invention is related to the obtaining and using of multifunctional foaming compositions with wettability modifying, corrosion inhibitory and inhibitory/dispersants mineral scale properties with high stability in environments of high temperature, high pressure and tolerance to high concentrations of divalent ions such as calcium, magnesium, strontium and barium. The multifunctional foaming compositions are obtained from the combination of supramolecular complexes resulting from interactions of alkyl amido propyl hydroxysultaines and/or alkyl amido propyl betaines and/or alkyl hydroxysultaines and/or alkyl betaines and anionic surfactant of type alkyl hydroxyl sodium sulfonate and alkenyl sulphonates of sodium, with cationic surfactants as tetra-alkyl ammonium halides and copolymers derivatives of itaconic acid/sodium vinyl sulfonate and/or terpolymers derived from itaconic acid/sodium vinyl sulphonate/aconitic acid. These multinational foaming compositions control the gas channeling and favorably change the wettability and increase the recovery factor of crude oil in naturally fractured reservoirs of carbonate type and heterogeneous lithology. In addition to this, the multifunctional foaming compositions of this invention exhibit anti-corrosive properties in typical environments of production tubing of crude oil and antifouling/dispersants of mineral salts as calcium carbonate, calcium sulfate, barium and strontium in the reservoir and in the production and injection pipelines.

A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one imidazoline; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.

The present invention generally relates to the use of aryl sulfonium salts as a corrosion inhibitor in a water injection system, a hydrocarbon extraction system, or a hydrocarbon production system. Treating oilfield injection and produced fluids with aryl sulfonium salts can significantly decrease microbially induced corrosion. Thus, these aryl sulfonium salts can be effectively used as corrosion inhibitors in oilfield fluids.

The invention provides the use of a surfactant as a corrosion inhibitor, wherein the surfactant is selected from derivatives of alkyl polyglucosides and derivatives of terpene alkoxylates, and mixtures thereof, provided that the derivatives are not sulfosuccinates. Also provided is a method of preventing or reducing corrosion of a metal component that is in contact with, or will be in contact with, an aqueous fluid, wherein the method comprises providing a surfactant and applying the surfactant to the metal component or adding the surfactant to the aqueous fluid that is in contact with, or will be in contact with, the metal component, wherein the surfactant is selected from derivatives of alkyl polyglucosides and derivatives of terpene alkoxylates, and mixtures thereof, provided that the derivatives are not sulfosuccinates.

A composition useful as corrosion inhibitor formulation for application in heavy brine systems, comprising at least one amidoamine; at least one sulfur synergist; at least one phosphate ester. In a preferred embodiment, the composition comprises additionally formulation bonding surfactant; and/or at least one solvent system.

A corrosion inhibiting composition includes a paraffinic oil present from 5 to 10 total weight percent, a sulfonated oil present from 15 to 25 total weight percent, a paraffin wax present from 1 to 10 total weight percent, a polymer present from 1 to 5 total weight percent, and at least one solvent present from 50 to 70 total weight percent. The corrosion inhibiting formulation does not include any aromatic solvents, and thus does not have the strong unpleasant odor common to alternatives.