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Effect of alternating voltage treatment on corrosion resistance of AZ91D magnesium alloy / X. Liu in Materials and corrosion, Vol. 63 N° 6 (Juin 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 6 (Juin 2012) . - pp. 505–516 Titre : Effect of alternating voltage treatment on corrosion resistance of AZ91D magnesium alloy Type de document : texte imprimé Auteurs : X. Liu, Auteur ; T. Zhang, Auteur ; Y. Shao, Auteur Année de publication : 2012 Article en page(s) : pp. 505–516 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion;  electrochemical  techniques;  magnesium  alloy;  surface;  XPS Résumé : AZ91D magnesium alloy was treated by the alternating voltage (AV) treatment technique. The optimal AV-treatment parameters of the alloy were determined by orthogonal experiments. Polarization curve, electrochemical impedance spectroscopy (EIS), and scanning electrochemical microscopy (SECM) were used to understand the effect of AV-treatment on the corrosion resistance of the alloy. AFM, contact angle, and XPS were employed to investigate further the influence of AV-treatment on the properties of the surface film formed on the alloy after AV-treatment. The results showed that a uniform and stable film was formed and the corrosion resistance of AZ91D magnesium alloy was significantly improved after AV-treatment. This was caused by the noticeable change of the chemical structure and semi-conducting properties of the surface film after AV-treatment. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005999/abstract [article] Effect of alternating voltage treatment on corrosion resistance of AZ91D magnesium alloy [texte imprimé] / X. Liu, Auteur ; T. Zhang, Auteur ; Y. Shao, Auteur . - 2012 . - pp. 505–516. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 6 (Juin 2012) . - pp. 505–516 Mots-clés : Corrosion;  electrochemical  techniques;  magnesium  alloy;  surface;  XPS Résumé : AZ91D magnesium alloy was treated by the alternating voltage (AV) treatment technique. The optimal AV-treatment parameters of the alloy were determined by orthogonal experiments. Polarization curve, electrochemical impedance spectroscopy (EIS), and scanning electrochemical microscopy (SECM) were used to understand the effect of AV-treatment on the corrosion resistance of the alloy. AFM, contact angle, and XPS were employed to investigate further the influence of AV-treatment on the properties of the surface film formed on the alloy after AV-treatment. The results showed that a uniform and stable film was formed and the corrosion resistance of AZ91D magnesium alloy was significantly improved after AV-treatment. This was caused by the noticeable change of the chemical structure and semi-conducting properties of the surface film after AV-treatment. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005999/abstract