Honeywell International Inc.

Prestone Products Corporation

Filipe J Marinho

Bo Yang

Aleksei V Gershun

Peter M Woyciesjes

Carol S Jeffcoate

Thomas G Kalagher

Laurie A Gallagher

Disclosed are coolants comprising brazed metal corrosion inhibitors.

Methods for inhibiting corrosion in brazed metal surfaces and coolants and additives for use therein

Disclosed is a pre-treated ion exchange resin comprising at least 15% by total number of exchangeable groups comprising at least one of an ion, or a Lewis acid, or a Lewis base resulting from a heat transfer fluid component having a pKor pKof greater than 5 in an aqueous solution at 25&#xb0; C., based on the total number of exchangeable groups. In one embodiment, the heat transfer fluid component is at least one of a colorant, a corrosion inhibitor, an antifoaming agent, a bitterant, a dispersant, or a combination thereof. In one embodiment, the heat transfer fluid component comprises a heat transfer fluid corrosion inhibitor. Also disclosed are heat transfer systems, assemblies, fuel cell systems and methods of maintaining a conductivity of less than 200 &#x3bc;S/cm in a heat transfer fluid that employ the disclosed pre-treated ion exchange resins.

Treated ion exchange resins, method of making, assemblies and heat transfer systems containing the same, and method of use

Disclosed herein is heat transfer system, comprising a brazed aluminum component, and a heat transfer fluid in fluid communication with the brazed aluminum component, wherein the heat transfer fluid comprises a liquid coolant, an oxy-anion of molybdenum, tungsten, vanadium, phosphorus, antimony, or a combination thereof, and a corrosion inhibitor. Also disclosed is a method of preventing corrosion in the heat transfer system, and a heat transfer fluid and additive package for use in the heat transfer system.

Heat transfer system additive package

Heat transfer system comprising brazed aluminum, method, heat transfer fluid, and additive package

Disclosed herein is a heat transfer system comprising a circulation loop defining a flow path for a heat transfer fluid, and a heat transfer fluid comprising a liquid coolant, a siloxane corrosion inhibitor of formula R3-Si&#x2014;[O&#x2014;Si(R)2]x-OSiR3, wherein R is independently an alkyl group or a polyalkylene oxide copolymer of 1 to 200 carbons, x is from 0 to 100, and further wherein at least one alkyl group and at least one polyalkylene oxide copolymer are present, and a non-conductive polydiorganosiloxane antifoam agent, wherein the conductivity of the heat transfer fluid is less than about 100 &#x3bc;S/cm, and wherein the heat transfer system comprises aluminum, magnesium, or a combination thereof, in intimate contact with the heat transfer fluid.

Heat transfer system, fluid, and method

Disclosed are coolants comprising brazed metal corrosion inhibitors. In one embodiment, the disclosed brazed metal corrosion inhibitor will comprise a polycarboxylic acid functional compound having the structure: 

Disclosed is a colored heat transfer fluid, the heat transfer fluid comprising a nonconductive colorant and having a conductivity of less than 200 &#x3bc;S/cm. Also provided is an assembly comprising an alternative power source and a heat transfer system in thermal communication with the alternative power source, the heat transfer system comprising the disclosed low conductivity colored heat transfer fluid. In addition, a method of making a colored heat transfer fluid is disclosed wherein the disclosed nonconductive colorants are added to a heat transfer fluid having a conductivity of less than 200 &#x3bc;S/cm.

Non-conductive colored heat transfer fluids

Disclosed is a colorant treated ion exchange resin comprising at least 15% of exchangeable groups comprising at least one of an ion, a Lewis acid, or a Lewis base resulting from a colorant having a pKor pKof greater than 5 in an aqueous solution at 25&#xb0; C., based on the total number of exchangeable groups. Also disclosed are heat transfer systems, assemblies, fuel cell systems and methods of maintaining a conductivity of less than 200 &#x3bc;S/cm in a heat transfer fluid that employ the disclosed colorant treated ion exchange resins. Finally, a method of making the disclosed colorant treated ion exchange resins is provided.

Colorant treated ion exchange resins, method of making, heat transfer systems and assemblies containing the same, and method of use

Disclosed is a corrosion inhibitor for use in heat transfer fluids having a conductivity of less than 200 &#x3bc;S/cm, the corrosion inhibitor having an azole compound, and at least one of a siloxane based surfactant, colloidal silica, or a mixture thereof. Also disclosed is a corrosion inhibiting heat transfer fluid, the heat transfer fluid having a conductivity of no more than or equal to 200 &#x3bc;S/cm and comprising the disclosed corrosion inhibitor. Also provided is an assembly comprising an alternative power source and a heat transfer system in thermal communication with the alternative power source, the heat transfer system comprising the disclosed corrosion inhibiting heat transfer fluid. In addition, a method of making a corrosion inhibiting heat transfer fluid is disclosed wherein the disclosed corrosion inhibitor is added to heat transfer fluid having a conductivity of less than 200 &#x3bc;S/cm.

Corrosion inhibitors, corrosion inhibiting heat transfer fluids, and the use thereof

A fluid composition includes a coolant and a plurality of nanoparticles dispersed within the coolant. The plurality of nanoparticles includes glass, silica, pumices, metal compounds adapted to react with chloride in the coolant, and/or mixtures thereof. The plurality of nanoparticles substantially increases heat capacity of the coolant and enhances heat transfer efficiency of the fluid composition.

Fluid composition having enhanced heat transfer efficiency

In one embodiment, a corrosion inhibiting composition is formed by combining: (a) an inorganic phosphate; (b) a water soluble polyelectrolyte polymer dispersant; (c) a tri or tetracarboxylic acid; and (d) at least one additional component comprising at least one of a C-Caliphatic or aromatic mono- or dicarboxylic acid, a silicate and at least one of a silicone or a silicate stabilizing siloxane compound, and mixtures thereof. Also disclosed are heat transfer fluids that include about 5% to about 99% by weight of freezing point-depressing agent; about 1% to about 95% by weight of water; and the disclosed corrosion inhibitor composition. A method of reducing corrosion in a heat transfer system containing one or more components that contain magnesium or a magnesium alloy requires that the system and the magnesium containing components be in contact with the disclosed heat transfer fluid.

Heat transfer fluid compositions for cooling systems containing magnesium or magnesium alloys

The present invention relates generally to heat transfer compositions. More particularly, the present invention relates to heat transfer compositions with high electrical resistance for use in power-generating equipment or in engines. Such compositions are particularly useful in fuel cell assemblies.

Growing community of inventors

Danbury, CT, United States of America

Filipe J Marinho