Process for the treatment of aqueous fluids to reduce corrosion

Details Process for the treatment of aqueous fluids to reduce corrosion Process for the treatment of aqueous fluids to reduce corrosion

1985-05-16

1989-09-26

Michl, Paul R.

Compositions

Etching or brightening compositions

252 71, 252 73, 252387, 252388, 252396, C09K 500

Patent

active

048698415

ABSTRACT:
The invention relates to a process making it possible to reduce the corrosion of metals and alloys of heat exchanger circuits where aqueous heat transfer fluids are circulating and which may contain anti-freeze products.
The process consists in mixing with these aqueous heat transfer fluids on the one hand from 0.05 to 5 percent by weight of one or more salts of alkali metals or of amines of dicarboxylic aliphatic acids of the formula (CH.sub.2)n(COOH).sub.2 in which n is comprised between 2 and 10 and on the other hand from 0.05 to 2.5 percent by weight of one or more polyols comprising a number of carbon atoms between 5 and 12 and a number of alcohol functions between 5 and 12 and possessing no reducing power.

REFERENCES:
patent: 2726215 (1955-12-01), Jones
patent: 3029204 (1962-04-01), Matuszak et al.
patent: 3712862 (1973-01-01), Bundrant et al.
patent: 3907578 (1975-09-01), Scherrer et al.
patent: 4153464 (1979-05-01), Sturwold et al.
patent: 4191801 (1980-03-01), Jahnke
patent: 4250042 (1981-02-01), Higgins
patent: 4382008 (1983-05-01), Boreland et al.

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