A corrosion inhibitor composition contains an organic long-chain compound having a polar group and hydrophobic silica. In a method for charging a corrosion inhibitor composition, the corrosion inhibitor composition constituted of a first corrosion inhibitor composition containing an organic long-chain compound having a polar group and a second corrosion inhibitor composition containing hydrophobic silica is charged into a fluid mixture including at least one hydrocarbon fluid selected from the group consisting of a liquid-phase hydrocarbon fluid and a gas-phase hydrocarbon fluid and water.

The present invention relates to development of high performing oil soluble and water dispersible corrosion inhibitor composition for mitigating internal corrosion of crude oil pipelines during storage and transportation of crude oils. The developed composition consists of acid-amine complex as corrosion inhibiting agent, mixture of organic acids as dispersing agent and ester derivative of alkylated phenol for better film formation. The present invention further relates to a process of preparation of the oil soluble and water dispersible corrosion inhibitor composition and subsequently a process for protecting the corrosion of internal metal surface of crude oil transportation pipelines using the corrosion inhibitor composition.

Provided are conducting members for fuel cells obtained by applying a protective film forming agent to a surface-treated base material having a base material and at least one alloy plating layer formed on the base material in order to form a protective film on the alloy plating layer, and thereafter subjecting the surface-treated base material to an acid treatment. In the conducting members for fuel cells of the present invention, the protective film forming agent preferably contains a mixture of a compound having a thiol group and an azole-based compound, and/or an azole-based compound having a thiol group. In the conducting members for fuel cells of the present invention, the acid treatment is preferably a treatment using sulfuric acid or nitric acid.

Provided are conducting members for fuel cells obtained by applying a protective film forming agent to a surface-treated base material having a base material and at least one alloy plating layer formed on the base material in order to form a protective film on the alloy plating layer, and thereafter subjecting the surface-treated base material to an acid treatment. In the conducting members for fuel cells of the present invention, the protective film forming agent preferably contains a mixture of a compound having a thiol group and an azole-based compound, and/or an azole-based compound having a thiol group. In the conducting members for fuel cells of the present invention, the acid treatment is preferably a treatment using sulfuric acid or nitric acid.

Corrosion inhibiting formulations including a substituted benzimidazole, a mercaptocarboxylic acid, a 2-thioxodihydropyrimidine-dione, a sulfhydryl alcohol, a surfactant, and a solvent. Methods for preventing, inhibiting, or reducing metal (e.g. carbon steel) corrosion utilizing these formulations are described. The formulations are effective against corrosion of metallic substrates in sweet (i.e. CO.sub.2), sour (i.e. H.sub.2S), and/or high salinity environments commonly found in petroleum industry.

The present disclosure relates to corrosion inhibitor compositions, formulations, and compounds. The compositions, formulations, and compounds may be used is various methods to inhibit corrosion of metallic surfaces in aqueous environments. The corrosion inhibitor compositions may include one of the following compounds or any combination of any of the compounds of formula (I):

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A preparation including a) at least one N-formal and b) at least one dialkylhydroxylamine. The preparation is preferably formulated as a concentrate. The preparation can be used (in particular in the form of the concentrate) for the reduction of free oxygen and the preservation of water, and also correspondingly additivated water. The mixture of N-formals with dialkylhydroxylamine is not only outstandingly compatible, but considerably improves the activity of dialkylhydroxylamines as oxygen scavengers.

A preparation including a) at least one N-formal and b) at least one dialkylhydroxylamine. The preparation is preferably formulated as a concentrate. The preparation can be used (in particular in the form of the concentrate) for the reduction of free oxygen and the preservation of water, and also correspondingly additivated water. The mixture of N-formals with dialkylhydroxylamine is not only outstandingly compatible, but considerably improves the activity of dialkylhydroxylamines as oxygen scavengers.

This disclosure is directed to the use of a portable Surface Enhance Raman Spectroscopy method to detect, quantify, and/or monitor corrosion inhibitors that are present in fluids in a wide range of concentrations in order to manage corrosion treatment in oil and gas production and refining systems or other industrial systems and to reduce the amount of time spent in obtaining data that is reliable and useful for corrosion control.

Disclosed here are the methods of using one or more multiple charged cationic compounds in a corrosion control composition to reduce corrosion of metal surfaces in a water system. The multiple charged cationic compounds are derived from polyamines through a ring-opening reaction with an epoxide or two reactions: an aza-Michael addition with an activated olefin having a cation group and a ring-opening reaction with an epoxide. The disclosed methods or compositions are found to be effective than those methods or compositions including commonly used corrosion inhibitors for water systems.