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      Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)-[1] methyl]-urea on Stainless Steel in Phosphoric Media

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          Abstract

          The adsorption of [(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)-methyl]-urea on iron in phosphoric media was studied by using electrochemical technique. The adsorption mechanism was investigated using adsorption isotherms. The experimental data fit localized adsorption models. The values for free energy of adsorption, ΔGads0, were also calculated at each surface coverage, θ of the studied compound by applying the mathematical model of Bockris - Swinkels adsorption isotherm. The variation of free energy of adsorption ΔGads0 with surface coverage, was interpreted in terms of deviation from ideal condition assumed in Langmuir model. A possible adsorption model of HPU2 molecules on to the metal surface was suggested.

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          Materials Letters

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            Author and article information

            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            pea
            Portugaliae Electrochimica Acta
            Port. Electrochim. Acta
            Sociedade Portuguesa de Electroquímica (Coimbra )
            0872-1904
            2009
            : 27
            : 5
            : 591-598
            Affiliations
            [1 ] Covenant University Nigeria
            Article
            S0872-19042009000500007
            20d7404a-082c-4959-87d1-bc82472738b4
            Product
            Product Information: website
            Categories
            ELECTROCHEMISTRY

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