Treatment of aqueous systems

Details Treatment of aqueous systems Treatment of aqueous systems

1981-06-09

1985-12-10

Smith, William F.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

422 15, 422 17, C23F 1100, C23F 1108, C23F 1110

Patent

active

045578966

ABSTRACT:
Composition and method for inhibiting corrosion in aqueous systems using synergistic combination of an inorganic nitrite and a phosphonate, e.g., 10-20 ppm sodium nitrite plus 0.5-5 ppm hydroxyethylidene diphosphonic acid.

REFERENCES:
patent: Re28553 (1975-09-01), Freyhold
patent: 3925245 (1975-12-01), Harris et al.
patent: 4057511 (1977-11-01), Bohnsack
patent: 4206075 (1980-06-01), Boffardi
patent: 4209398 (1980-06-01), Ii
patent: 4209487 (1980-06-01), Hogue et al.
patent: 4277359 (1981-04-01), Lipinski
patent: 4317744 (1982-03-01), Levi
Held, Kuhlwasser, Vulkan-Verlag, p. 218, (Essen, 1970).
Marshall, "An Investigation into the Mechanism of Inhibition of a Synergistic Dionodic Corrosion Inhibitor", Corrosion-NACE, vol. 37, No. 4, pp. 214-222, (Apr. 1981).

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