Corrosion inhibitors and processes for using the same

Details Corrosion inhibitors and processes for using the same Corrosion inhibitors and processes for using the same

1975-06-02

1976-11-02

Weinblatt, Mayer

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

21 27R, 210 58, 252388, 210 58, C02B 100, C02B 306

Patent

active

039896374

ABSTRACT:
Carboxylated lactones of the general formula ##EQU1## wherein R.sup.1 and R.sup.2 are individually selected from hydrogen, hydroxy, alkyl, hydroxyalkyl, --COOM, --CHOHCOOM, --CH.sub.2 COOM and a 1,3-dioxolane, 5-oxo group, and R.sup.3 is selected from hydrogen and --COOM, wherein M is hydrogen, alkali metal, ammonium or alkylammonium, provided that at least one of R.sup.1, R.sup.2 and R.sup.3 contain a carboxyl group, are disclosed as inhibiting the corrosion of metals by oxygen-bearing waters. The carboxylated lactones can be employed either alone or in combination with thiols, 1,2,3-triazoles, zinc salts, chromates, silicates, inorganic phosphates, molybdates, tannins, lignins, lignin sulfonates, calcium and magnesium salts and mixtures thereof.

REFERENCES:
patent: 699422 (1902-05-01), Sternberg
patent: 3173925 (1965-03-01), Seeliger
patent: 3295917 (1967-01-01), Cotton et al.
patent: 3763189 (1973-10-01), Harken

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