Abstract:
Coolants with low electrical conductivity can be used in direct or indirect cooling of electronic devices. The coolant has at least one glycol, water, at least one azole derivative, at least one ester of orthosilicic acid or alkoxy alkylsilane, optionally at least one tertiary amine bearing at least one 2-hydroxyethyl- or 2-hydroxypropyl-group, optionally at least one monocarboxylic acid, optionally at least one silicophosphonate, and optionally at least one further coolant additive.
Abstract:
Antifreeze concentrate with corrosion protection which is suitable for coolants and heat transfer fluids and comprises freezing point-lowering liquids and also particular sulfur-comprising organic compounds, inorganic molybdate salts, inorganic phosphate salts and aliphatic, cycloaliphatic or aromatic monocarboxylic, dicarboxylic or tricarboxylic acids as corrosion inhibitors. Aqueous coolant compositions which are suitable for cooling an internal combustion engine whose cooling apparatus has been made of aluminum using a soldering process using a fluoroaluminate flux can be obtained therefrom.
Abstract:
Corrosion protection formulation comprising (A) from 0.01 to 5% by weight of alkylamine ethoxylates as surfactant component, (B) from 0.01 to 10% by weight of corrosion inhibitors, (C) from 0 to 0.3% by weight of thickeners, (D) from 5 to