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Inhibitive Action of Argan Press Cake Extract on the Corrosion of Steel in Acidic Media

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      Abstract

      The inhibitive action of the Argan press cake extract (ACE) against corrosion of C38 steel in a 1 M HCl solution was investigated using potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS) and weight loss measurements. The inhibition efficiency increases with increasing extract concentration and decreases with temperature. The kinetic parameters (activation energy, pre-exponential factor, enthalpy of activation and entropy of activation) were calculated and discussed. The Argan press cake extract acted as a mixed-type inhibitor with predominant cathodic effectiveness. The Nyquist plots showed that on increasing ACE concentration, increases charge transfer resistance and decreases double layer capacitance. The adsorption of components of the the Argan press cake extract (ACE) on the surface of the C38 steel follows the Langmuir adsorption isotherm. E (%) values obtained from various methods used are in good agreement.

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      Most cited references 48

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       Popova,  A. POPOVA,  A Popova (2007)
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            Author and article information

            Affiliations
            [1 ] Ecole Nationale des Sciences Appliquées Morocco
            [2 ] Université Mohammed Premier Morocco
            [3 ] Faculté des Sciences Morocco
            [4 ] Université de Tahar Moulay Saida Algeria
            [5 ] King Saud University Saudi Arabia
            [6 ] Université de Reims France
            [7 ] Université Ibn Zohr Morocco
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            Journal
            pea
            Portugaliae Electrochimica Acta
            Port. Electrochim. Acta
            Sociedade Portuguesa de Electroquímica (Coimbra )
            0872-1904
            July 2012
            : 30
            : 4
            : 267-279
            S0872-19042012000400004
            10.4152/pea.201204267

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Portugal
            Categories
            ELECTROCHEMISTRY

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