Corrosion inhibition in highly acidic environments

Details Corrosion inhibition in highly acidic environments Corrosion inhibition in highly acidic environments

1991-05-29

1992-12-08

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

422 12, 252146, 252148, 252149, 564192, 564162, 564 4, 568448, 5483001, C23F 1104

Patent

active

051695987

ABSTRACT:
A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium having a temperature of at least about 200.degree. F. is disclosed. The method comprises incorporating into the mediumn a corrosion inhibiting amount of a corrosion inhibitor comprising the reaction product of an aldehyde and a composition corresponding to the formula: ##STR1## wherein R.sup.1 is a hydrocarbon group, R.sup.2 and R.sup.3 are independently selected from H and alkyl, R.sup.4 is H, alkyl, alkanol or (alkylene-N).sub.n H wherein n is at least one, and x is 2 or 3. The present invention is also directed to a such method in which the corrosion inhibitor comprises a compound corresponding to the formula: ##STR2## wherein R.sup.1, R.sup.2, and R.sup.3 and x are defined as above.

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patent: 4310435 (1982-01-01), Frenier
patent: 4332967 (1982-06-01), Thompson et al.
patent: 4393026 (1983-07-01), Thompson et al.
patent: 4450137 (1984-05-01), Thomson et al.

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