Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5 wt.% NaCl solution

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2012

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Elsevier
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https://hdl.handle.net/20.500.14352/124179

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. Arrabal, A. Pardo, M.C. Merino, M. Mohedano, P. Casajús, K. Paucar, G. Garcés, Effect of Nd on the corrosion behaviour of AM50 and AZ91D magnesium alloys in 3.5wt.% NaCl solution, Corrosion Science, Volume 55, 2012, Pages 301-312, ISSN 0010-938X, https://doi.org/10.1016/j.corsci.2011.10.033.

Abstract

The corrosion performance of AM50 and AZ91D alloys containing up to 1.5 wt.% Nd was investigated by electrochemical and gravimetric measurements in 3.5 wt.% NaCl at 22 C. The alloys were characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD) and surface potential maps. In Nd-containing alloys, formation of Al2Nd and Al–Mn–Nd intermetallic compounds reduced the volume fraction and modified the morphology of the b-Mg17Al12 phase. The addition of Nd improved the corrosion resistance of the alloys due to increased passivity of the surface film and suppression of micro-galvanic couples.

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3303 Ingeniería y Tecnología Químicas

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