| abstract |
The present invention provides a composition in contact with a corrodable metal surface, comprising a functional fluid and, as corrosion inhibitor, a compound having the formula I: ##STR1## as well as salts or esters thereof, wherein R 1 is C 4 -C 20 linear or branched alkyl, phenyl or C 7 -C 20 alkylphenyl; n R 2 is C 1 -C 12 linear or branched alkyl, phenyl or C 7 -C 20 alkylphenyl, or arylalkyl containing 7-20 carbon atoms; n X is CH 2 , O or S; n Y is O or S; and n Z is --(CH 2 ) n -- in which n is 1, 2, 3, 4 or 5, or Z is --CH 2 --CH(CH 3 )--. n Some of the compounds of formula I are new. |