| 摘要 |
Corrosion inhibitors comprising (a) an imidazoline of the formula I <IMAGE> (I) in which R1 is hydrogen, C1-C6-hydroxyalkyl, C1-C6-aminoalkyl or C2-C19-carboxyalky or an ammonium or amine salt thereof and R2 is hydrogen, C1-C17-alkyl or C2-C17-alkenyl, (b) a heterocyclic polyacid of the formula II <IMAGE> (II) in which R3 is C2-C6-carboxyalkyl or an alkali metal, alkaline earth metal, ammonium or amine salt thereof, (c) at least one alkanolamine of the formula III <IMAGE> (III) in which R4 is C1-C6-hydroxyalkyl and R5 and R6, which can be identical or different, are hydrogen, C1-C6-alkyl or C1-C6-hydroxyalkyl, and (d) water are outstandingly suitable for the corrosion-inhibiting treatment of shaped iron and steel parts. |
