Multilayered polypyrrole–SiO2 composite coatings for functionalization of stainless steel: Characterization and corrosion protection behavior |
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| Affiliation: | 1. Unité de Recherche Mécanique-Energétique—ENIT, Equipe COPROMET, Université de Tunis-El-Manar, BP 37, Belvédère 1002, Tunisie;2. Institut UTINAM, UMR CNRS 6123, Université de Franche-Comté, 30 Avenue de l’observatoire, 25009 Besançon Cedex, France;3. Institut UTINAM UMR UFC CNRS 6123, Université de Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France;1. Luxembourg Institute of Science and Technology (LIST), Avenue des Hauts-Fourneaux 5, L4362 Esch-sur-Alzette, Luxembourg;2. UMET-ISP, UMR 8207, ENSCL, Université Lille Nord de France, BP 90108, 59652 Villeneuve d’Ascq Cedex, France;3. Université de Toulouse, UPS, INPT, LAPLACE – Laboratoire Plasma et Conversion d’Energie, 118 route de Narbonne, Toulouse Cedex 9 31062 France;1. Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia;2. Department of Pure and Industrial Chemistry, Bayero University Kano, Nigeria;3. Institute of Nanotechnology and Catalysis (NanoCat), University of Malaya, Kuala Lumpur, 50603, Malaysia;4. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia;1. Materials Chemistry Laboratory, Faculty of Sciences, Mohammed First University, 60000 Oujda, Morocco;2. Materials and Environmental Laboratory, Faculty of Sciences, Ibn Zohr University, 80000 Agadir, Morocco;3. Department of Mechanical Systems Engineering, Faculty of Engineering, Hiroshima Institute of Technology, 2-1-1 Miyake, Saeki-ku, Hiroshima 731-5193, Japan |
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| Abstract: | Two different multilayered composite polypyrrole/SiO2 coatings were synthesized on 304 stainless steel. Electrochemical and electrophoretic depositions were used to grow polypyrrole and SiO2 layers, respectively. Coatings were characterized by glow discharge optical emission spectroscopy to observe repartition of elements within different layers, by scanning electron microscopy to observe surface morphology and by electrochemistry to investigate corrosion protection behavior. The electrophoretic approach enables good incorporation of SiO2 particles. This incorporation was more extensive and more homogeneous than for coatings obtained with the mixing method related in previous works. Moreover, incorporation and repartition of SiO2 particles are greatly enhanced when the silica layer is grown directly on the steel surface. Corrosion protection of the stainless steel substrate was improved when multilayered composite polypyrrole/SiO2 coatings were used. |
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| Keywords: | Polypyrrole Electropolymerization Electrophoretic deposition Glow discharge optical emission spectroscopy |
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