Corrosion inhibition of aluminium alloys by tolyltriazole in chloride solutions

Abstract

The effect of tolyltriazole (TTA) on the corrosion of Al‐Cu, Al‐Si‐Cu and Al‐Cu‐Fe alloys in HCl (pH = 0.5) and NaCl (pH = 6 and 11) respectively at 15^○C, 25^○C and 35^○C has been studied by electrochemical methods. Corrosion potentials, corrosion rates, polarization resistances, inhibition efficiencies and activation energies have been determined. The results have shown that the inhibition efficiencies of TTA changed with pH and temperature. TTA has been adsorbed on the alloys to form Cu(I)‐TTA film. TTA was more efficient at pH = 0.5 and 6 than at pH = 11. Increasing the temperature from 15^○C to 35^○C decreased the inhibition effect of TTA.

Citation

Önal, A.N. and Aksüt, A.A. (2000), "Corrosion inhibition of aluminium alloys by tolyltriazole in chloride solutions", Anti-Corrosion Methods and Materials, Vol. 47 No. 6, pp. 339-349. https://doi.org/10.1108/00035590010354177