Hydroxybenzoic acid as pH buffer and corrosion inhibitor for ant

Details Hydroxybenzoic acid as pH buffer and corrosion inhibitor for ant Hydroxybenzoic acid as pH buffer and corrosion inhibitor for ant

1979-01-02

1980-07-01

Weinblatt, Mayer

Compositions

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

Organic components

252 73, 252 75, 252 77, 252 781, 252 783, 252389R, 252396, 422 14, C09K 1532

Patent

active

042105480

ABSTRACT:
This invention relates to single-phase antifreeze or coolant concentrates comprising an alcohol, a corrosion inhibiting amount of a water-soluble organosiloxane-silicate copolymer corrosion inhibitor and an organic basic pH buffer capable of buffering pH in the range of about 9 to about 11 comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are used as coolants either undiluted or upon dilution with about 25 percent to about 90 percent by weight of water based upon the total weight of the concentrate. The alcohol is preferably ethylene glycol. The coolant compositions are effective in providing protection against corrosion of all metals and alloys used in industrial heat exchangers are especially effective in inhibiting the corrosion of aluminum internal combustion engine and radiator components.

REFERENCES:
patent: 2094564 (1937-09-01), Schenck et al.
patent: 3341469 (1967-09-01), Piwes et al.

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