Anti-corrosion composition for use in aqueous systems

Details Anti-corrosion composition for use in aqueous systems Anti-corrosion composition for use in aqueous systems

1978-06-08

1979-11-27

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

252181, 252389A, 252391, 252392, 422 16, 422 18, 422 19, C02B 504, C02B 506, C23F 1108

Patent

active

041760590

ABSTRACT:
A low toxicity, corrosion and scale inhibiting composition for use in recirculating aqueous systems, e.g. in heat exchangers, comprises from about 3-1,000 parts by weight of molybdate, from about 0.5-1,000 parts by weight of an organic cationic or non-ionic surfactant, from about 0.3-1,000 parts by weight of a water soluble polyphosphate and from about 0.05-500 parts by weight of an azole, for example tolyltriazole. The composition is water soluble or water dispersible, and is effective in very small amounts (3-3,500 ppm) for corrosion control of metals such as carbon steel, copper and aluminum exposed to circulating water.

REFERENCES:
patent: 2736658 (1956-02-01), Pfohl et al.
patent: 3891568 (1975-06-01), Mishio et al.
patent: 3931043 (1976-01-01), Walker et al.
patent: 3935125 (1976-01-01), Jacob
patent: 4101441 (1978-07-01), Hwa et al.

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