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US 8,617,415 B2Granted
Heat transfer fluids and corrosion inhibitor formulations for use thereof
AssigneePrestone Products Corporation
InventorsBo Yang, Aleksei Gershun, Peter Woyciesjes
Life of this patent
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Abstract
Disclosed herein is a heat transfer fluid comprises: a freezing point-depressant; an aliphatic carboxylic acid, a salt thereof, or a combination of the foregoing; an inorganic phosphate; a magnesium compound; deionized water; and a component selected from the group consisting of azole compounds, copper alloy corrosion inhibitors, phosphonocarboxylates, phosphinocarboxylates, and combinations of two or more of the foregoing components. Also described is a heat transfer system comprising the heat transfer fluid.
Claims20
A heat transfer fluid comprising
- a freezing point-depressant;
- an aliphatic carboxylic acid, a salt thereof, or a combination of the foregoing;
- an inorganic phosphate;
- a magnesium compound;
- deionized water, and
- a component selected from the group consisting of azole compounds, copper alloy corrosion inhibitors, phosphonocarboxylates, phosphinocarboxylates, and combinations of two or more of the foregoing components,
- wherein the magnesium compound is present in an amount such that the heat transfer fluid has a magnesium ion concentration of 0.5 to 100 parts per million by weight;
- and
- wherein the heat transfer fluid is free of silicates and borates.
6 more elements
Dependencies are inferred from the claim text.