Abstract
The effect of Cephalexin monohydrate drug on the corrosion performance of low carbon steel (LCS) in 1 M HCl solution has been examined by weight reduction (WR), potentiodynamic polarization (PP) and AC impedance spectroscopy (EIS) tests. The inhibition efficiency (IE) raised with increasing the cephalexin monohydrate drug dose but lowered with higher temperatures. The adsorption of the Cephalexin monohydrate drug established to follow Temkin isotherm. The PP tests designated that the cephalexin monohydrate drug is of mixed type. Synergism among iodide ion and cephalexin monohydrate drug was suggested. The outcome data gotten from the three altered tests were in excellent agreement. Theoretical relationships have been utilized to examine the influence of molecular structure on IE of the Cephalexin monohydrate drug.