SERS Studies of the Corrosion Inhibition of BTA and Its Derivative 5 CBTA on Copper Electrode in NaCl Solution

The corrosion inhibition of BTA and its derivative 5CBTA on Cu in 3% NaCl solution were studied by SERS technique. As from a protective film through the triazole ring, the inhibition mechanism for these inhibitors are found to be nearly the same. When the potential turn to negative, the molecules of BTA or 5CBTA are gradually adsorbed on the copper surface. The substitute group (—COOH) of 5CBTA acts as a steric hindrance. A combination of BTA and 5CBTA doesn't show any synergistic effect and the adsorption substance on the copper surface is mainly BTA.