Heat transfer fluids containing dicarboxylic acid mixtures as corrosion inhibitors
First Claim
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1. A coolant composition comprising a major portion of one or more water-soluble liquid alcohol freezing point depressants and a corrosion-inhibiting amount of an inhibitor consisting essentially of (1) from about 2.0 to about 5.5 weight parts of a mixture of decanedioic acid and dodecanedioic acid or salts thereof per 100 weight parts of the coolant composition and (2) from about 0.5 to about 0.5 weight parts of a hydrocarbyl triazole or salt thereof per 100 weight parts of the coolant composition.
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Abstract
A coolant composition for use in automotive engines is disclosed which comprises a liquid alcohol freezing depressant and a corrosion inhibitor consisting essentially of decanedioic acid, dodecanedioic acid and sodium tolyltriazole.
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8 Claims
- 1. A coolant composition comprising a major portion of one or more water-soluble liquid alcohol freezing point depressants and a corrosion-inhibiting amount of an inhibitor consisting essentially of (1) from about 2.0 to about 5.5 weight parts of a mixture of decanedioic acid and dodecanedioic acid or salts thereof per 100 weight parts of the coolant composition and (2) from about 0.5 to about 0.5 weight parts of a hydrocarbyl triazole or salt thereof per 100 weight parts of the coolant composition.
Specification