Patent ID: 6043199
Filing Date: 2000-03-28
Classification: C10M,C10N

Abstract:
A turbine oil composition exhibiting enhanced corrosion inhibiting capacity comprising a major amount of a synthetic ester oil base stock and a minor amount of corrosion inhibiting additive, said corrosion inhibiting additive comprising a combination of as a first component one or more C.sub.6 -C.sub.40 dicarboxylic acids, present in an amount in the range of 100 to 1000 ppm, and a second component selected from (a) linear or branched alkyl or alkenyl succinic acid/anhydride ester or hemi ester or hydroxylated derivative of such esters or hemi esters and (b) linear or branched alkyl or alkenyl substituted succinimides or succinamides or mixtures thereof or amino-substituted succinimides, or succinamides or mixtures thereof wherein said succinimides, succinamides or mixtures thereof is HITEC 536, MOBILAD C-603 or mixture thereof, the turbine oil containing the aforesaid combination employing component (a) being marked by the absence of any pyridine derivatives of the formula ##STR13## wherein R.sub.1, R.sub.2, R.sub.3 are individually an alkyl group containing from 1 to 3 carbon atoms.