Corrosion inhibitors for hypochlorous acid aqueous solutions are provided and impart corrosion inhibiting effects of suppressing the generation of rust in contacted metal surfaces to hypochlorous acid aqueous solutions. Effective components of the corrosion inhibitors comprise only: an A component composed of (A1) a metal salt of formic acid and/or (A2) a metal salt of saturated carboxylic acid, wherein the number n of carbon atoms contained in the molecule is at least 2, the valence v of the acid is 1 or 2, and the value n/v obtained by dividing the number n of carbon atoms by the valence v of the carboxylic acid is 2-6; and a B component composed of a nonionic surfactant, wherein the mass ratio B/A of the B component to the A component in the effective component is 0.005-10.0.

New compositions, for example, corrosion inhibited compositions, and the like compositions and new methods of using such compositions are disclosed. Such compositions may be liquid solutions, for example, substantially without solid material formation and/or crystal formation, and may include different concentrations of organic acid components and/or different combinations of organic acid components relative to previous compositions. The present compositions may be used as antifreeze coolant compositions or formulations, for example, in the cooling systems of internal combustion engines.

Inhibitors and methods for reducing or inhibiting corrosion and/or scale of metals in aqueous systems are provided. Inhibitor compositions may include a polymer and hydrophosphorylated polycarboxylic acids, such as 1-(hydroxyhydrophosphoryl)butane-1,2,3,4-tetracarboxylic acid. The compositions may include other components, such as zinc, molybdate, silicate, cerium, among others. The disclosed hydrophosphorylated polycarboxylic acids are stable in the presence of biocides.

The present invention relates to the use of phospho-tartaric acid and/or the salts thereof for the treatment of water in water-conducting systems.

The present invention relates to the low cost high performing corrosion inhibitor composition and process for preparation thereof. The corrosion inhibitor comprises of an ester of cashew nut shell liquid (CNSL), a dimer fatty acid (DFA), a long chain amine and a solvent. The corrosion inhibitor composition prevents corrosion of internal metal surface of pipelines due to petroleum products.

The present invention provides a real, commercially viable alternative to known heat transfer fluids which exhibits essentially the same or improved viscosity profiles and avoids the corrosion problems. The present invention relates to a heat transfer fluid composition comprising between 10 to 80% by weight of a corrosion inhibitor and freeze point depressant dual function agent, and a viscosity reducing agent. Also disclosed are aqueous based heat transfer fluid products and their use in various heating and/or cooling systems.

This invention relates to corrosion inhibitor additive combinations giving long acting performance in oxygenated gasoline blends comprising either low carbon number (<3) or high carbon number (greater than or equal to 4) alcohols or mixtures thereof and adapted for use in fuel delivery systems and internal combustion engines. The invention also is concerned with a process for conferring anti-corrosion properties to oxygenates in gasoline fuel mixtures wherein the oxygenate comprises biologically-derived butanol.

An additive comprising one or more C.sub.3-C.sub.12 hydroxycarboxylic acids and/or one or more C.sub.3-C.sub.12 hydroxycarboxylic acid salts may be added to an aqueous system having galvanized metallurgy or a carbon steel surface in an effective amount to passivate a galvanized coating on the metallurgy or to decrease white rust formation or other types of corrosion upon the galvanized metallurgy or carbon steel surface in an aqueous system. In a non-limiting embodiment, the C.sub.3-C.sub.12 hydroxycarboxylic acid or the C.sub.3-C.sub.12 hydroxycarboxylic acid salt additive may utilize the zinc in the galvanized coating to achieve passivation. The passivation may occur while the system is shut down or in service. The aqueous system may be or include a cooling tower, a cooling water system, and combinations thereof. The additive may be used with or in the absence of a phosphorous-containing compound.

A heat transfer fluid or thermal management system fluid that includes a freezing point depressant; water having an electrical conductivity less than 5 ?S/cm; and a corrosion inhibitor composition that includes one or more electrically non-conductive, low electrical conductivity corrosion inhibitors, or a combination of one or more organic acid and one or more organic base; wherein a conductivity of the heat transfer fluid is less than or equal to about 500 ?S/cm.

A composition for inhibiting corrosion and/or removing hydrocarbonaceous deposits in oil and gas applications is provided. The composition comprises an iron sulfide dissolver, an organic solvent, and a corrosion inhibitor.