Evaluating the corrosion inhibition potential of expired ivermectin drug on mild steel: A comprehensive multi-method investigation

• Study: Expired Ivermectin inhibits corrosion on mild steel. • Techniques: Gravimetry, thermometry, potentiodynamic analysis, computational modeling used. • Results: Noteworthy corrosion inhibition in 2 M H2SO4. • Concentration: 500 ppm, ∼90 % inhibition, room temp, 6-hour immersion. • Practical implications for acid washing in industries. A comprehensive study was carried out to examine the potential of expired ivermectin drugs to inhibit corrosion on mild steel. Various techniques such as gravimetry, thermometry, potentiodynamic analysis, and computational modelling were utilized to ascertain the drug's inhibitory efficacy. According to the results, the ivermectin drug that had reached its expiration date demonstrated noteworthy properties in inhibiting corrosion in a solution containing 2 mol/L H 2 SO 4 . At a concentration of 500 mg/L, it exhibits approximately 90% inhibition efficiency at room temperature up to 6 h of immersion time. The findings suggest that the expired ivermectin drug can be utilized as a potential corrosion inhibitor during acid washing, which could have significant practical implications in various industries. To optimize its use as a corrosion inhibitor further research is required to investigate the performance of the drug under different conditions.