Investigation of Expired Depakin Tablet as Corrosion Inhibitor for Decreasing Carbon Footprint

Abstract

Efforts to reduce carbon footprint are gaining momentum due to environmental and energy problems. For this purpose, it has gained importance to investigate the inhibition potential of pharmacological chemicals used as drug active substances that have completed their shelf life in order to prevent corrosion. Because drug recovery eliminates disposal, transportation and storage costs, the energy to be spent for all these works is reduced and accordingly the carbon footprint is reduced. In this study, the effects of expired “Depakin” capsule on the corrosion behavior of mild steel were investigated. Quantum chemical parameters of the active ingredient, valproic acid, were determined by DFT approach. Electrochemical behaviors were investigated in 0.5 M HCl solution by EIS and polarization methods. According to the results obtained, the protection efficiency of Depakin, whose potential inhibitory capacity was determined, was determined as 79%.