Hydroxybenzoic acid as pH buffer and corrosion inhibitor for alk

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

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 77, 252 781, 252 783, 252389R, 252396, 252 76, 422 7, 422 17, 422 18, C09K 1532, C23F 1106, C23F 1110, C23F 1118

Patent

active

042410142

ABSTRACT:
A single-phase antifreeze or coolant concentrate is disclosed comprising a major proportion of at least one alcohol, at least one water-soluble silicate, and an organic basic pH buffer and corrosion inhibitor comprising at least one hydroxybenzoic acid. The concentrates can be used without dilution but are preferably used, upon dilution with water. The concentrates are generally diluted for use in 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 alcohol-based antifreeze and coolant compositions of the invention are effective in the protection against corrosion of all metals and alloys used in industrial processes and are especially effective when used to inhibit 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: 3198820 (1965-08-01), Pines et al.
patent: 3234144 (1966-02-01), Morehouse

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