Study of the Correlation between Microstructure and Corrosion Resistance of the AZ91D Magnesium Alloy

Renato Altobelli Antunes; Mara Cristina Lopes de Oliveira; Lucas Costa de Castro Ferraz; Letícia dos Reis Gonçales; Olandir Vercino Correa

doi:10.4028/www.scientific.net/MSF.930.405

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HomeMaterials Science ForumMaterials Science Forum Vol. 930Study of the Correlation between Microstructure...

Study of the Correlation between Microstructure and Corrosion Resistance of the AZ91D Magnesium Alloy

Abstract:

The aim of the present work was to study the influence of beta phase precipitates content and distribution on the corrosion behavior of the AZ91D magnesium alloy, using samples subjected to solution annealing and aging. The morphology of the beta phase was observed using optical microscopy and scanning electron microscopy. The volume fraction of each phase was also determined. Potentiodynamic polarization tests and immersion tests were carried out, indicating an increase of the corrosion resistance with the volume fraction of the beta phase and its distribution on the grain boundaries of the alpha-phase. Solution annealed samples were more susceptible to corrosion.

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Periodical:

Materials Science Forum (Volume 930)

Pages:

405-410

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.930.405

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Online since:

September 2018

Authors:

Renato Altobelli Antunes*, Mara Cristina Lopes de Oliveira, Lucas Costa de Castro Ferraz, Letícia dos Reis Gonçales, Olandir Vercino Correa

Keywords:

AZ91D, Beta Phase, Corrosion Resistance, Precipitates Distribution

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