الفهرس 
published paperOnly 14 pages are availabe for public view
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Abstract
The present work is assigned to study the corrosion behavior of carbon steel in 0.5 M H2SO4 and the inhibiting effect of some plant extracts. The obtained results from weight loss method showed that the inhibition efficiency of these extracts increased by increasing their concentration and increase with increasing temperature so that the adsorption of these extracts is chemical and the adsorption of the plant extracts compounds on carbon steel surface in 0.5 M H2SO4 follows Temkin isotherm. Some thermodynamic parameters are computed and discussed. The polarization curves indicated that these extracts influence both cathodic and anodic processes to the same extent. from the impedance spectroscopy data, we conclude that: The value of Rct increases with increasing the concentration of the plant extract inhibitors. from the Electrochemical frequency modulation data, we conclude that the corrosion current density decreases by increasing the concentration of the studied plant extracts. The surface morphology of carbon steel was studied. The results obtained from different techniques were in good agreement.