Corrosion-inhibiting coating compositions

Details Corrosion-inhibiting coating compositions Corrosion-inhibiting coating compositions

C - Chemistry, Metallurgy

07

D

31/53, 260/309.5

C07D 277/74 (2006.01) C09D 5/08 (2006.01) C23F 11/16 (2006.01)

Patent

CA 2005983

The present invention provides a corrosion-inhibiting coating composition comprising: a) an acid-sensitive film former; and b) as a corrosion inhibitor, an effective amount of a salt of i) an aliphatic or cycloaliphatic mono-, di tri- or tetra-carboxylic acid which is substituted in its aliphatic or cycloaliphatic radical by at least one group of the formula (see fig. I) in which each R independently of the others is hydrogen, alkyl, halogenoalkyl, alkoxy, alkylthio, alkylsulfonyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, halogen, -CN, -NO2, -COOH, COOalkyl, -OH or a primary, secondary or tertiary amino or carbamoyl group; with ii) n molar equivalents of an amine of the formula (see fig. II) in which X, Y and Z are the same or different and each it hydrogen, alkyl optionally interrupted by one or more oxygen atoms, or alkyl substituted by hydroxy, or is phenyl, phenyl alkyl or alkylphenyl; and n is 1, 2, 3 or 4 depending upon the number of carboxyl groups in the carboxylic acid b i).

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