Inhibitor to Reduce Tarnishing of Copper

Benzotriazole (BTA), CeHsNs, is a corrosion inhibitor widely used for copper and its alloys. Typical protective films formed on copper are reported to consist of various multilayers. Film thickness is normally controlled by the pH of the solution, ranging from less than 0.01 pm in near-neutral and mildly basic solutions to 0.5 pm in acidic solutions [33]. For a wide variety of conditions [34], this inhibitor is reported to form a Cu+ surface complex following its adsorption on CU2O that is present on copper surfaces. 

in Symposium sur les Inhibiteurs de Corrosion, University of Ferrara, Italy, 1961, p. 257. 

Antropov, Kinetics of Electrode Processes and Null Points of Metals, Council of Scientific Industrial Research, New Delhi, 1960, pp. 48-82. 

Antropov, Inhibitors of metalhc corrosion and the phi-scale of potentials. First International Congress on Metallic Corrosion, Butterworths, London, 1961, p. 147. 

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