الفهرس 
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Abstract
Inhibition of corrosion of Copper by ampicillin , amoxicillin,septazole and streptoquin in 0.1M HCl was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Polarization studies were carried out at different temperatures and showed that the investigated compounds are anodic inhibitors. The effect of temperature on corrosion inhibition has been studied and thermodynamic activation and adsorption parameters were calculated and discussed. Electrochemical impedance and electrochemical frequence modulation were used to investigate the mechanism of corrosion inhibition. The inhibition occurs through adsorption of the investigated compounds on the copper surface without modifying the mechanism of corrosion process. The experimental data fit both of Langmuir and kinetic-thermodynamic isotherm. A clear correlation was found between corrosion inhibition efficiency and theoretical parameters obtained by PM3 semi empirical method. The experimental results are supported by the theoretical data.