Plasma anodized ZE41 magnesium alloy sealed with hybrid epoxy-silane coating |
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| Affiliation: | 1. University of Aveiro, CICECO, Dep. Materials and Ceramic Eng., 3810-193 Aveiro, Portugal;2. Belarusian State University, Leningradskaya St. 14, 220050 Minsk, Belarus;3. ICEMS, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1409-001 Lisboa, Portugal;1. School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Road 92, 150001 Harbin, PR China;2. Magnesium Innovation Centre (MagIC), Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany;3. Department of Materials and Ceramic Engineering, CICECO–Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;4. Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany;5. Faculty of Engineering, University of Kiel, Kaiserstrasse 2, 24143 Kiel, Germany;1. School of Chemical Engineering, National Technical University of Athens, Research Unit of Advanced, Composite, Nano Materials & Nanotechnology, 9 Heroon Polytechniou St., Zographos, Athens GR-157 80, Greece;2. Center for Microscopy—Microanalysis and Information Processing, University Politehnica Bucharest, Splaiul Independentei 313, Sector 6, Bucharest, Romania;1. CQE, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. Sorbonne Universités, UPMC Univ Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 11 place Marcelin Berthelot, 75005 Paris, France;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. Institute of Materials Research, Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH, Max-Plank-Str. 1, Geesthacht 21502, Germany;3. Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal;1. School of Materials, The University of Manchester, Manchester M13 9PL, UK;2. CEITEC IPM, ?i?kova 22, Brno 616 62, Czech Republic;3. Institute of Physics of Materials, AS CR, ?i?kova 22, Brno 616 62, Czech Republic;4. SAFIR, Institut des NanoSciences de Paris, UMR7588 du CNRS, Université de Pierre et Marie Curie, 4 place Jussieu, 75252 Paris, France;5. Division of Materials Chemistry, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan |
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| Abstract: | Anodic coatings on magnesium ZE41 alloy were formed by DC plasma electrolytic oxidation (PEO) in spark regime in solution composed of NaOH, Na2SiO3 and KF. The positive effect of poly(ethylene oxide) addition into the anodizing electrolyte on PEO process, anodic film porosity and its protective performance was described. Anodic films were sealed with hybrid epoxy-silane formulation. The corrosion behavior of the coated ZE41 was studied through electrochemical impedance spectroscopy (EIS) in 0.6 M NaCl solution. Resulting duplex PEO/epoxy-silane coating provides good protective performance without significant signs of corrosion during 1 month of immersion test. |
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| Keywords: | A Magnesium A Alloy B EIS B SEM C Anodic films C Polymer coatings |
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