| 摘要 |
New composition comprises a functional fluid in contact with ferrous metal and a corrosion inhibiting amount of at least one compound of formula (I) <IMAGE> (I) or a derivative thereof in which R1, R2 and R3 are, independently, hydrogen, a C1-C15 straight or branched chain alkyl residue, a C5-C12 cycloalkyl residue, a C6-C15 aryl residue or C7-C12 alkaryl residue, and R4 and R5 are, independently, hydrogen, 2-hydroxyethyl or 2-hydroxypropyl with the provisos that (a) R4 and R5 are not simultaneously hydrogen, (b) when R4 and R5 are each -CH2-CH2-OH, R1 and R2 are not simultaneously hydrogen and R3 is not a pentyl residue and (c) that polyalkylene and phenol or polycarboxylic ester co-additives are absent; as well as salts thereof. Some of the compounds of formula I are new.
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