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Fabrication and characterization of micro-arc oxidation (MAO) coatings on Mg-Li alloy in alkaline polyphosphate electrolytes without and with the addition of K2TiF6 / L. Song in Materials and corrosion, Vol. 62 N° 12 (Décembre 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 12 (Décembre 2011) . - pp. 1124–1132 Titre : Fabrication and characterization of micro-arc oxidation (MAO) coatings on Mg-Li alloy in alkaline polyphosphate electrolytes without and with the addition of K2TiF6 Type de document : texte imprimé Auteurs : L. Song, Auteur ; Y. Kou, Auteur ; Y. Song, Auteur Année de publication : 2012 Article en page(s) : pp. 1124–1132 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  resistance  Mg-Li  alloy  Micro-arc  oxidation Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Micro-arc oxidation (MAO) has been accomplished on Mg-Li alloy in alkaline polyphosphate electrolytes without and with the addition of 10 g/L K2TiF6. The surface/cross-section microstructures of the fabricated coatings were analyzed by scanning electron microscope (SEM); the compositions of the fabricated MAO coatings were analyzed by X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDAX); the corrosion behaviors of bare and MAO coated Mg-Li alloys were evaluated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Novel hybrid MAO coatings which showed hybrid composition of MgF2/Ti2O5/Ti6O11/MgO, as well as hybrid structure of a dense inner layer, a dense outer layer and an intermediate layer with some sealed/semi-sealed pores, had been fabricated on Mg-Li alloy in alkaline polyphosphate electrolytes with the addition of K2TiF6. Meanwhile, the corrosion resistance of the fabricated MAO coatings was improved obviously as the result of the addition of K2TiF6 in the electrolytes. Moreover, the multiple roles of on the MAO process accounted for the fabrication of the corrosion-resistant hybrid MAO coatings. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006050/abstract [article] Fabrication and characterization of micro-arc oxidation (MAO) coatings on Mg-Li alloy in alkaline polyphosphate electrolytes without and with the addition of K2TiF6 [texte imprimé] / L. Song, Auteur ; Y. Kou, Auteur ; Y. Song, Auteur . - 2012 . - pp. 1124–1132. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 12 (Décembre 2011) . - pp. 1124–1132 Mots-clés : Corrosion  resistance  Mg-Li  alloy  Micro-arc  oxidation Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Micro-arc oxidation (MAO) has been accomplished on Mg-Li alloy in alkaline polyphosphate electrolytes without and with the addition of 10 g/L K2TiF6. The surface/cross-section microstructures of the fabricated coatings were analyzed by scanning electron microscope (SEM); the compositions of the fabricated MAO coatings were analyzed by X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDAX); the corrosion behaviors of bare and MAO coated Mg-Li alloys were evaluated using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) in 3.5 wt% NaCl solution. Novel hybrid MAO coatings which showed hybrid composition of MgF2/Ti2O5/Ti6O11/MgO, as well as hybrid structure of a dense inner layer, a dense outer layer and an intermediate layer with some sealed/semi-sealed pores, had been fabricated on Mg-Li alloy in alkaline polyphosphate electrolytes with the addition of K2TiF6. Meanwhile, the corrosion resistance of the fabricated MAO coatings was improved obviously as the result of the addition of K2TiF6 in the electrolytes. Moreover, the multiple roles of on the MAO process accounted for the fabrication of the corrosion-resistant hybrid MAO coatings. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006050/abstract