Electrochemical tests were conducted to evaluate the inhibition effects of a commercial sodium nitrite (NaNO{sub}2)/sodium tolyltriazole (nitrite/TTA)-based corrosion inhibitor added to deionized water at 50℃. General and pitting corrosion of materials commonly used in closed cooling water systems were examined. Tests also were performed in deionized water to which Cl{sup}- had been added. At the tested concentrations, nitrite/TTA was found to be an effective corrosion inhibitor for all of the materials tested in plain deionized water and Cl{sup}-containing water.
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