Patent ID: 8236204

Claim:
A composition comprising: one or more tetrahydrobenzotriazoles having the general formulas Ia or Ib: wherein R 1 is one or more of: hydrogen, a hydroxy group, or an aliphatic group; and wherein R 2 is hydrogen, or an aliphatic group; or a salt of the tetrahydrobenzotriazoles; and one or more other triazoles having the general formula II: wherein R 3 is one or more of: hydrogen, a hydroxy group, an aliphatic group, or an aromatic group, R 4 is hydrogen, or an aliphatic group; or a salt of the other triazoles; and wherein the tetrahydrobenzotriazoles are in a weight ratio to the other triazoles in the range of from about 1:89 to about 1:8; one or more tetrahydrobenzotriazole activating solvents which are one or more of: methanol; ethanol; propanol; isopropanol; butanol; isobutanol; pentanol; isopentanol, hexanol; isohexanol; propylene glycol; ethylene diglycol; diethylene glycol; triethylene glycol; dipropylene glycol; butylene glycol; butyl diethylene glycol; glycerol; methyl, ethyl, propyl and/or butyl monoethers of ethylene glycol, diethylene glycol, propylene glycol, or dipropylene glycol; polyethylene glycol; polypropylene glycol; random-added polypropylene polyethylene glycols; or block copolymers of ethylene and propylene oxide; wherein the tetrahydrobenzotriazoles are solubilized in the activating solvents in an amount effective to inhibit corrosion of a metal or metal alloy which is corrodible in the presence of; and wherein the combination of the tetrahydrobenzotriazoles and the activating solvents comprise from about 10 to about 90% by weight of the tetrahydrobenzotriazoles and from about 10 to about 90% by weight of the activating solvents.