Corrosion inhibitor

Details Corrosion inhibitor Corrosion inhibitor

1987-08-28

1989-10-31

Terapane, John F.

Compositions

Preservative agents

Anti-corrosion

422 16, 106 1416, C23F 1110

Patent

active

048775525

ABSTRACT:
Corrosion inhibitors comprising
(a) an imidazoline of the formula I ##STR1## in which R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -hydroxyalkyl, C.sub.1 -C.sub.6 -aminoalkyl or C.sub.2 -C.sub.19 -carboxyalky or an ammonium or amine salt thereof and R.sup.2 is hydrogen, C.sub.1 -C.sub.17 -alkyl or C.sub.2 -C.sub.17 -alkenyl,
(b) a heterocyclic polyacid of the formula II ##STR2## in which R.sup.3 is C.sub.2 -C.sub.6 -carboxyalkyl or an alkali metal, alkaline earth metal, ammonium or amine salt thereof,
(c) at least one alkanolamine of the formula III ##STR3## in which R.sup.4 is C.sub.1 -C.sub.6 -hydroxyalkyl and R.sup.5 and R.sup.6, which can be identical or different, are hydrogen, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -hydroxyalkyl, and
(d) water are outstandingly suitable for the corrosion-inhibiting treatment of shaped iron and steel parts.

REFERENCES:
patent: 2468163 (1949-04-01), Blair et al.
patent: 2889193 (1959-06-01), Denman et al.
patent: 3625859 (1971-12-01), Hashimoto et al.
patent: 4402907 (1983-09-01), Clark
patent: 4517114 (1985-05-01), Oppenlaender et al.
Chem. Abstract, 92, 151729v, (1980).

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