Abstract
The inhibiting activity of CIE(CIE) to the dissolution of Al in 2M HCl medium was carried out by chemical strategies (mass loss and gasometry) and electrochemical systems, for example, tafel polarization (TP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM). Surface morphology was examined utilizing atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). Fourier transform infrared spectroscopy (FTIR) outcomes indicated that the inhibition mechanism was by adsorption process through the functional groups that exist in the investigated extract. The results demonstrated that the inhibiting efficiency expanded with expanding amounts of the extract. Polarization information demonstrated that CIE goes about as an inhibitor of mixed type. The procedure of adsorption on Al surface ascribed to Langmuir isotherm. All thermodynamic calculations were determined and discussed. The inhibitive efficiencies obtained from all utilized procedures have acceptable values.
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