Corrosion inhibited alcohol compositions

Claim 1

An antifreeze concentrate composition excluding alkali metal nitrites consisting essentially of in admixture, an alcohol selected from the group consisting of at least one of methanol, ethanol, propanol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol and glycerol and, as an inhibitor, an effective amount of (A) an amino acid or derivative having the formula: ##STR8## wherein m is an integer of 1-6, Y is selected from a group consisting of H, an alkali metal, and NH 4 and X is selected from a group consisting of CH 2 CH 2 OH, C 1 -C 6 alkyl, phenyl, and H; or ##STR9## wherein Y is selected from a group consisting of H, an alkali metal, and NH 4 and X is selected from a group consisting of phenyl, H, and NH 2 ; wherein at least one X is NH 2 ; or ##STR10## wherein m is an integer of 1-6, Y is selected from a group consisting of H, an alkali metal, and NH 4 and Z is C 2 -C 5 alkylene, (B) a conventional corrosion inhibitor selected from the group consisting of at least one of the alkali metal carbonates, borax, the alkali metal dichromates, the alkali metal dichromates, the alkali metal silicates, the alkali metal nitrates, phosphorous acid, phosphoric acid, an alkali metal tungstate, an alkali metal salt of benzoic or toluic acid, an alkali metal salt of a phenol, benzotriazole, tolyltriazole, and an organo-silicone compound; (C) about 0.5 percent to about 15 percent by weight of an alkali metal phosphate; and (D) about 0.03 percent to about 2 percent by weight of a heterocyclic nitrogen compound having the formula: ##STR11## wherein R 1 is individually selected from hydrogen or a monovalent radical selected from the group consisting of straight or branched chain monovalent alkyl radicals having 1 to 18 carbon atoms, a monovalent cycloalkyl or alkoxy radical having up to 18 carbon atoms, a monovalent alkylene radical having 1 to 18 carbon atoms, a monovalent aryl radical, a monovalent alkylaryl radical having 1 to 18 carbon atoms in the alkyl portion thereof, or wherein each R 1 is combined into a single divalent alkyl radical having 2 to 18 carbon atoms; wherein R 2 is a divalent radical selected from the group consisting of alkyl and alkoxy radicals having 2 to about 18 carbon atoms, and where alkoxy, said radical is derived from an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, and mixtures thereof; and wherein M is an alkali metal.