Corrosion Resistance of ZK40 Magnesium Alloys Modified with Individual Rare Earth Elements and Calcium Oxide Addition

Ricardo Henrique Buzolin*, Marta Mohedano, Carsten Blawert, Chamini Lakshi Mendis, Haroldo Cavalcanti Pinto, Norbert Hort

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The effect of individual additions of calcium oxide (CaO), Gd, Nd and Y was investigated on the microstructure and corrosion resistance of the as-cast ZK40 alloy. The microstructural features were analysed using scanning electron microscopy. Electrochemical Impedance Spectroscopy, hydrogen evolution and weight loss under immersion in 0.5 wt.% NaCl solution were used to evaluate the corrosion behaviour. The corrosion behaviour was enhanced with the addition of CaO and Gd. The addition of Nd is detrimental to the corrosion resistance of the ZK40. More general corrosion is observed for the ZK40-CaO, while severe localised corrosion occurs for the ZK40-Nd.
Original languageEnglish
Pages (from-to)48-51
Number of pages4
JournalMaterial-ES
Volume4
Issue number3
Publication statusPublished - 2020

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