Process and composition for inhibiting corrosion of metal parts

Details Process and composition for inhibiting corrosion of metal parts Process and composition for inhibiting corrosion of metal parts

1977-03-23

1979-04-17

Hart, Charles N.

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

210 58, 252180, 252389A, 252390, 252391, 422 16, C02B 502, C02B 506

Patent

active

041499697

ABSTRACT:
A process and a composition for inhibiting corrosion of metal parts in water systems such as in recirculating cooling towers and the like, while additionally suppressing scale formation and inhibiting corrosion of copper and copper-containing alloys which comprises adding and dissolving in the aqueous system, a controlled combination of active constituents in effective amounts comprising as essential constituents, an alkali molybdate salt, a divalent metal cation selected from the group consisting of ZN.sup.++, Mn.sup.++ and Ni.sup.++ ; 1-hydroxyethylidene-1,1-diphosphonic acid and the aqueous soluble alkali salts thereof; and an organic agent selected from the group consisting of 2-mercaptobenzothiazole and the alkali salts thereof; 1,2,3-benzotriazole, and tolyltriazole.

REFERENCES:
patent: 3714066 (1973-01-01), King et al.
patent: 3794603 (1974-02-01), O'Neal Jr. et al.
patent: 3891568 (1975-06-01), Nishio et al.
patent: 3989637 (1976-11-01), Hogue et al.

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