Antifreeze corrosion inhibitor composition for aluminum engines

Details Antifreeze corrosion inhibitor composition for aluminum engines Antifreeze corrosion inhibitor composition for aluminum engines

1988-07-01

1989-10-10

Lieberman, Paul

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 74, 252 783, 25238954, 25238931, C09K 500

Patent

active

048730114

ABSTRACT:
An antifreeze composition for use in aluminum internal combustion engines is disclosed. It is comprised of from 0.05 percent to 0.5 percent silicate, from 0.07 percent to 0.35 percent nitrate, from 0.2 percent to 2.0 percent phosphate, from 0.5 percent to 4.0 percent benzoate, from 0.1 percent to 1.0 percent molybdate, from 0.02 percent to 0.3 percent vanadate, from 0.05 percent to 0.3 percent triazole, and from 100 ppm to 5000 ppm organosilane stabilizer for the silicate. Organic amines and borates are excluded in the compositions and the pH of the compositions is from about 7 to about 9.

REFERENCES:
patent: 4292190 (1981-09-01), Davis et al.
patent: 4338209 (1982-07-01), Manabe et al.
patent: 4466896 (1984-08-01), Darden
patent: 4548787 (1985-10-01), Wilson et al.

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