INVESTIGATION OF ADSORPTION AND INHIBITIVE EFFECT OF CALIXARENE DERIVATIVE NEWLY SYNTHESIZED TOWARDS C38 STEEL IN MOLARHCl

R. Souane, M. Kaddouri, M. Bouklah, N. Cheriaa, B. Hammouti () and J. Vicens
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R. Souane: Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences, Oujda, Morocco;
M. Kaddouri: Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences, Oujda, Morocco
M. Bouklah: Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences, Oujda, Morocco
N. Cheriaa: ECPM, IPCH, UMR 7815 du CNRS-ULP, 25 rue Becquerel, 67087 Strasbourg, Cedex 2, France;
B. Hammouti: Laboratoire de Chimie Appliquée et Environnement, Faculté des Sciences, Oujda, Morocco
J. Vicens: ECPM, IPCH, UMR 7815 du CNRS-ULP, 25 rue Becquerel, 67087 Strasbourg, Cedex 2, France

Surface Review and Letters (SRL), 2009, vol. 16, issue 03, 401-406

Abstract: The focus of this study is to synthesize a new calixarene derivative namely calix[6]arene (C21) and to test its performance as corrosion inhibitor of C38 steel in molarHClat 308 K. Polarization and weight loss measurements were used. Weight loss tests show thatC21retards until to stop corrosion phenomenon at5 × 10-5M.C21is an excellent inhibitor and its inhibition efficiency increases with its concentration to reach 100% since5 × 10-5M. Polarization curves revealed thatC21affects both cathodic and anodic domains by decreasing current densities and then it may be classified as a mixed type inhibitor. The calixarene tested is adsorbed on the surface according to the Langmuir adsorption isotherm. Free enthalpy of adsorption reveals thatC21acts from chemisorption onto the steel surface.

Keywords: Corrosion; steel; calixarene; inhibition; hydrochloric acid (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012780

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