Expired ganciclovir drug as sustainable corrosion inhibitor on Mild Steel (MS) in 3 M HCl solution: Atomic absorption spectroscopy, potentiodynamic polarization, Nyquist plot and scanning electron microscopy studies

The adsorption tendency of expired Ganciclovir drug on mild steel (MS) in 3 M HCl solution was demonstrated by using atomic absorption spectroscopy, potentiodynamic polarization, impedance spectroscopy and scanning electron microscopy (SEM) studies. The atomic absorption spectroscopy studies shows that, the protection rate enhances with rise in the concentration of expired Ganciclovir drug on the MS in 3 M HCl solution. The potentiodynamic polarization studies show that, the investigated nontoxic corrosion inhibitor act as mixed type corrosion inhibitor. The Nyquist plots and SEM studies shows that, formation of protective invisible film is due to the adsorption of expired Ganciclovir drug molecules on the MS surface in 3 M HCl solution.