| 摘要 |
A corrosion inhibiting lubricating composition comprises: (a) a synthetic ester base stock; (b) at least one aromatic amine antioxidant; (c) a neutral organic phosphate of the formula (R1O)3 PO where R1 is a tolyl, phenyl, xylyl, alkyl or cycloalkyl group, the alkyl or cycloalkyl group having up to 10 carbon atoms; (d) a saturated or unsaturated dicarboxylic acid of for- mula (I) wherein x + y + z is an integer in the range from 2 to 22 inclusive and where at least one of the groups R1 to R5 is a carboxylic acid group; or a dicarboxylic acid of one of the three formulae (II, III, IV); (e) a straight or branched chain satu- rated or unsaturated monocarboxylic acid which is optionally sulphurised or an ester of such an acid; and (f) a triazole of formula (V) or a triazole selected from 1,2,4 triazole, 1,2,3 triazole, 5- anilo-1,2,3,4-thiatriazole, 3-amino-1,2,4 triazole, 1-H- benzotriazole-1-yl-methylisocyanide, methylene-bis-benzotriazole and naphthotriazole.
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