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

1979-10-09

1980-12-23

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

252 73, 252 75, 252 76, 252 77, 252 781, 252 783, 252389R, 252396, 422 7, 422 17, C09K 1532, C23F 1106, C23F 1110

Patent

active

042410134

ABSTRACT:
A single-phase antifreeze or coolant concentrate is disclosed comprising an alcohol, an aminosilicone-silicate copolymer and an organic basic buffer and corrosion inhibitor comprising a hydroxybenzoic acid or mixtures thereof. The concentrates are preferably used as coolants either undiluted or upon dilution with about 25 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 and 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: 2411676 (1946-11-01), Burghart
patent: 3203969 (1965-08-01), Pines et al.
patent: 3234144 (1966-02-01), Morehouse

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