Abstract
The inhibition effect of three molecules of antibiotic drugs, namely, gentamicin, kanamycin, amikacin on aluminum corrosion in 1.0 M HCl solution has been investigated using weight loss, hydrogen evolution reaction, polarization and electrochemical impedance spectroscopy techniques. The inhibition efficiency increases with increasing the concentration of inhibitor and decreasing temperature. Polarization measurements showed that the studied antibiotic compounds acting as mixed type inhibitors. The adsorption follows the Langmuir isotherm model. Some activated thermodynamic parameters are calculated and explained. One capacitive loop was observed for all spectra in EIS indicating that the corrosion of aluminum corrosion is under charge transfer control.