Expired Atenolol Drug: A Nontoxic Corrosion Inhibitor for Al in 3 M HCl Pickling Environment

Abstract

Corrosion protection of expired Atenolol drug on the Al in the 3[Formula: see text]M HCl was investigated through the weight loss, gasometric, Tafel plot, impedance, atomic absorption spectroscopy (AAS), quantum chemical, scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies. The addition of different concentrations of expired Atenolol drug enhances the protection efficiency. Gasometric technique was performed in order to study the variation in the amount of hydrogen gas in the presence and absence of the inhibitor. The potentiodynamic polarization plots show that the expired Atenolol drug acts as a mixed type. Data of impedance studies show that the charge transfer process controls the corrosion of Al in the 3[Formula: see text]M HCl medium. The SEM and AFM results explore that the expired Atenolol drug is a powerful corrosion inhibitor for the Al in HCl solution.