A Composite Coating for Corrosion and Wear Protection of AM60B Magnesium Alloy

da Forno, Anna; Bestetti, Massimiliano

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A Composite Coating for Corrosion and Wear Protection of AM60B Magnesium Alloy, p.79
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Home > Advanced Materials Research > Light Weight Metal Corrosion and Modeling > A Composite Coating for Corrosion and Wear...

Paper Title:

A Composite Coating for Corrosion and Wear Protection of AM60B Magnesium Alloy

Periodical	Advanced Materials Research (Volume 138)
Main Theme	Light Weight Metal Corrosion and Modeling
Edited by	Stefano Trasatti and Juliet Ippolito
Pages	79-84
DOI	10.4028/www.scientific.net/AMR.138.79
Citation	Anna da Forno et al., 2010, Advanced Materials Research, 138, 79
Online since	October, 2010
Authors	Anna da Forno, Massimiliano Bestetti
Keywords	Corrosion Resistance, Magnesium Alloy, Micro-Arc Anodizing, Wear Resistance
Price	US$ 28,-

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Abstract

In this paper a protection process against corrosion and wear for AM60B magnesium alloys, by multilayer approach, is related. The coating consists of a porous oxide layer, obtained in micro-arc anodizing regime, and two or three layers deposited by sol-gel technique. The anodic oxidation pre-treatment improves the adhesion of the sol-gel layers, which are responsible for the sealing of the anodic oxide pores and for the corrosion protection effect. In addition the multilayer system significantly improves AM60B alloy wear resistance. Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) were employed to assess morphology and crystallographic structure. Electrochemical polarization and wear tests were performed in order to evaluate the corrosion resistance behaviour and the wear resistance of the coated magnesium alloys.