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Protection against corrosion of magnesium alloys with both conversion layer and sol–gel coating

Murillo-Gutiérrez, Noé Verner and Ansart, Florence and Bonino, Jean-Pierre and Menu, Marie-Joëlle and Gressier, Marie Protection against corrosion of magnesium alloys with both conversion layer and sol–gel coating. (2013) Surface and Coatings Technology, 232. 606-615. ISSN 0257-8972

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.surfcoat.2013.06.036


The anticorrosion performances of a system consisting of a phosphate based conversion layer and a hybrid sol–gel coating have been evaluated for the magnesium alloy Elektron21. The lone sol–gel coating affords a significant protection of the magnesium substrate. However, the presence of an intermediate conversion layer is presumed to improve the corrosion resistance of the system. The surface morphology of the protection coatings was characterized by optical microscopy, scanning electron microscopy (SEM) and white-light source interferometry. The corrosion behavior of the systems was analyzed by electrochemical impedance spectroscopy (EIS). The impedance measurements show that the presence of the added conversion layer increases the resistance of the whole system during immersion in a 0.05 M NaCl solution, compared to the single sol–gel coating.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Sciencedirect website : http://www.sciencedirect.com/science/article/pii/S0257897213005458
HAL Id:hal-01169884
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:30 Jun 2015 12:18

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