Study of some drugs as corrosion inhibitors for mild steel in 1M H2SO4 solution

Abstract

This work is focusing on some drugs (Amoxicillin, Cefixim and Cephalexin) to use as corrosion inhibitors for the mild steel in 1M H2SO4 aqueous solution. Weighting loss measurements were used for 24 hours at 30 o C. The results of corrosion process showed that higher inhibition efficiency values of these drugs have obtained with the highest concentration. The increasing of inhib itor concentration was accompanied with corrosion rate to be decreased, inhibition efficiencies increased and surface coverage degree increased. The adsorption free energy values were predicted physisorption effect for (Amoxicillin, Cefixim and Cephalexin) which explained the interaction nature between the organic molecule as corrosion inhibitors and metal surface.