Aqueous media of decreased corrosiveness for iron-containing met

Details Aqueous media of decreased corrosiveness for iron-containing met Aqueous media of decreased corrosiveness for iron-containing met

1978-03-10

1981-11-10

Barr, J. L.

Compositions

Preservative agents

Anti-corrosion

252392, 252389R, 422 15, 422 19, 106 1405, 106 1412, 106 1415, C09K 300

Patent

active

042997259

ABSTRACT:
Aqueous media having a dissolved content of a small amount, (less than 100 p.p.m.) of a mixture of aminoalkanols of the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent H and C.sub.1-18 unbranched alkyl substituents (the sum of the carbon atoms in R.sub.1 and R.sub.2 being 9 to 18), R.sub.3 and R.sub.4 each represent H,C.sub.1-4 alkyl and C.sub.2-4 hydroxyalkyl substituents, x represents 2 to 6, and y represents 0 to 1, the ##STR2## units in the aminoalkanols being of at least two different chain lengths in the range of 11 to 20 carbon atoms, possess decreased tendency to corrode iron-containing metals including steel. The mixtures are also useful in salt form. The efficiency of the mixture is improved by various additives which act synergistically therewith.

REFERENCES:
patent: 3398198 (1968-08-01), Kersnar et al.
patent: 3668094 (1972-06-01), Hatch
patent: 3668138 (1972-06-01), Hoover et al.

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