Corrosion inhibiting additive combination for turbine oils

摘要

Turbine oils of improved corrosion resistance comprise a synthetic ester base stock and additives comprising a combination of a dibasic carboxylic acid and a second component selected from N-acyl derivative of C10-C20 linear or branched alkyl or alkenyl monocarboxylic acid, alkyl or alkenyl succinic acid/anhydride ester or hemi-linear or branched ester and hydroxylated derivatives of such esters or hemi esters, and linear or branched alkyl or alkenyl substituted succinimide or amino substituted succinimide.