Electrochemical Studies of Aluminium-2014 Alloy in 1M Acetic Acid using Olive leaf Extract as Corrosion Inhibitor

Abstract

The inhibition performance of atenolol on Aluminium-2014 in 1 M Acetic Acid solution was studied by weight loss and electrochemical methods. The results show the inhibition efficiency was found to increase with increasing the concentration of the inhibitor from 50 to 300 ppm. The maximum inhibition efficiency 93.8% was observed in the presence of 300 ppm inhibitor (in case of potentiodynamic polarization). The inhibition action of atenolol was explained in terms of adsorption on the Aluminium-2014 surface. Electrochemical Impedance spectroscopic technique (EIS) exhibits one capacitive loop indicating that, the corrosion reaction is controlled by charge transfer process. Polarization measurements showed that the inhibitor is of a mixed type. The results obtained from the different methods are in good agreement. The surface morphologies of Aluminium-2014 were examined by scanning electron microscope (SEM).