Abstract
THE INHIBITION effect of Salicornia Begolovi extract (SBE) as saving corrosion inhibitor foraluminum (Al) in1 M HCl solution was studied using weight loss (WL), electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM) and potentiodynamic polarization (PP) measurements. It was found that the Salicornia extract acts as a good inhibitor for aluminum corrosion in the acid solution. The inhibition efficiency (IE) increaseswithincreasing of both extract dose and temperature, indicating that this extract was adsorbed chemically on Al surface. PP studiesindicated that the extract acts as a mixed type inhibitor. EIS studies showed a reduction in the double layer capacitance and an increase in the charge transfer resistance. The adsorption of extract molecules was found to obey Temkinadsorption isotherm. The extract provides a good protection film to aluminumagainst corrosion in HClsolutions. Surface analysis was tested using scanning electron microscope (SEM). The results obtained from all investigated techniques are in good agreement.