Combination corrosion/scale inhibitor

Details Combination corrosion/scale inhibitor Combination corrosion/scale inhibitor

1984-03-09

1985-11-19

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

252147, 252148, 252180, 252 855E, 252389R, 252394, C02C 502

Patent

active

045540900

ABSTRACT:
A combination corrosion and scale inhibitor composition comprising the reaction product of a heterocyclic nitrogen containing compound (e.g., mixtures of alkyl substituted pyridines) and aldehyde (e.g., formaldehyde) and a phosphoric acid constituent (e.g., phosphoric acid or phosphonic acid). Such compositions exhibit, simultaneously, inhibition to oxidation corrosion (rusting of carbon steel); suppression of sulfide corrosion (H.sub.2 S in NaCl brine) and the prevention of mineral scaling (CaCO.sub.3 and CaSO.sub.4 scale precipitation).

REFERENCES:
patent: 2468163 (1949-04-01), Blair, Jr. et al.
patent: 2472400 (1949-06-01), Bond et al.
patent: 3803047 (1974-04-01), Hwa
patent: 4243591 (1981-01-01), Magin

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