| 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:n as well as salts or esters thereof, wherein nR¹ is C₄-C₂₀ linear or branched alkyl, phenyl or C₇-C₂₀ alkylphenyl; nR² is C₁-C₁₂ linear or branched alkyl, phenyl or C₇-C₂₀ alkylphenyl, or arylalkyl containing 7-20 carbon atoms; nX is CH₂, O or S; nY is O or S; and nZ is -(CH₂) n - in which n is 1, 2, 3, 4 or 5, or Z is -CH₂-CH(CH₃)-. n Some of the compounds of formula I are new. |