Corrosion Inhibition Study Using Ofloxacin (Antibiotics) As Corrosion Inhibitor for Mild Steel in Hci Medium

Abstract

This study explores the corrosion inhibition performance of ofloxacin for mild steel in 0.1 M and 0.5 M hydrochloric acid solutions and was investigated using the gravimetric (weight loss) method at 298 K. Different concentrations of ofloxacin (0.1–0.5 g/L) were employed to evaluate its effect on corrosion rate, inhibition efficiency and surface coverage. The results revealed that ofloxacin significantly reduced the corrosion rate of mild steel in both acidic media. Maximum inhibition efficiencies of 78.86% in 0.5 M HCl and 70.86% in 0.1 M HCl were achieved at 0.5 g/L inhibitor concentration. The inhibition efficiency increased with increasing inhibitor concentration, indicating adsorption-controlled inhibition. Adsorption of ofloxacin on the mild steel surface followed the Langmuir adsorption isotherm, suggesting monolayer adsorption. The study confirms that ofloxacin is an effective corrosion inhibitor for mild steel in hydrochloric acid environments.