Anodic Oxidation and Silane Treatment for Corrosion Protection of AM60B Magnesium Alloy

Anna da Forno; Massimiliano Bestetti; Nora Lecis; Stefano Paolo Trasatti; Monica Trueba

doi:10.4028/www.scientific.net/MSF.690.413

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HomeMaterials Science ForumMaterials Science Forum Vol. 690Anodic Oxidation and Silane Treatment for...

Anodic Oxidation and Silane Treatment for Corrosion Protection of AM60B Magnesium Alloy

Abstract:

Oxide films have been produced on AM60B magnesium alloy using micro-arc oxidation process in an environmentally friendly alkaline solution with and without addition of different oxides nanoparticles (TiO₂, ZrO₂ and Al₂O₃). In order to seal the oxides porosity generated in the sparking process, a silane-based top coat has been applied. The surface morphology of samples was analyzed by Scanning Electron Microscopy (SEM). Scratch tests were performed for evaluating the adhesion strength of the anodic oxides. The corrosion resistance of the oxide- silane- based topcoat composite coatings was evaluated in 3.5% NaCl solution using anodic polarization tests. The anodizing in oxides nanoparticles rich solutions (ZrO₂or Al₂O₃), followed by a silane top coat treatment performed using OSi as precursor, is an interesting way to synthesize adherent corrosion resistant coatings on magnesium alloy AM60B.

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Materials Science Forum (Volume 690)

Pages:

413-416

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.690.413

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Online since:

June 2011

Authors:

Anna da Forno, Massimiliano Bestetti, Nora Lecis, Stefano Paolo Trasatti, Monica Trueba

Keywords:

Corrosion Resistance, Magnesium Alloy, Microarc Anodizing, Nanoparticle Oxide, Scratch Test, Silane Deposition

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