Patent ID: 8535569

Claim:
A method comprising the following steps: (a) providing a composition comprising a corrosion inhibiting component having: 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 tetrahydrotriazoles; 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; wherein the tetrahydrobenzotriazoles are in a weight ratio to the other triazoles in the range of from about 1:89 to about 1:8 such that the composition decreases the General Corrosion rate, as measured by copper electrodes in the presence of 10 ppm sodium hypochlorite, by at least about 0.05 mpy relative to a corrosion inhibitor component comprising 100% of the other triazoles; wherein the corrosion inhibiting component comprises from about 10 to 100% of the composition; and (b) contacting a metal component which is corrodible in the presence of copper or copper corroding agents with the composition of step (a) to inhibit corrosion of the metal component by copper or copper corroding agents; wherein step (b) is carried out by incorporating the composition of step (a) in a fluid which is in contact with the metal component such there is a concentration of the corrosion inhibiting component in the fluid of at least about 1 ppm.