Inhibition Effect of Schiff Base and Ce(NO3)3 Complex on the Corrosion of 1060 Pure Aluminum

Abstract:

A kind of triazole Schiff base was synthesized: 3-pyridine-4-amino-1,2,4-triazole-5-thione. The inhibition effects of Schiff base and Ce(NO₃)₃ complex on corrosion of 1060 pure aluminum in 3.5% NaCl have been studied by potentiodynamic polarization, electrochemical impedance spectroscopy and scanning electron microscopy with energy dispersive spectrometer. The results show that Schiff base can effectively inhibit the corrosion of pure aluminum in NaCl solution at 293 K. When concentration of Schiff base is 0.4 g.L_-1, the inhibition efficiency is up to the highest, 76.0%. Schiff base is a mixed inhibitor, the adsorption of Schiff base on the 1060 pure aluminum surface was well fit by the Langmuir isotherm model, and there are both physisorption and chemisorption. Schiff base can inhibit the corrosion of pure aluminum and possesses a good synergistic effect with Ce(NO₃)₃, the corrosion inhibition efficiency of 0.2 g.L_-1 Schiff base and 0.03 g.L_-1 Ce(NO₃)₃ is up to 88.2%.