Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions

Hagihara, Koji, Okubo, Masayoshi, Yamasaki, Michiaki and Nakano, Takayoshi (2016) Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions. Corrosion Science, 109 68-85. doi:10.1016/j.corsci.2016.03.019


Author Hagihara, Koji
Okubo, Masayoshi
Yamasaki, Michiaki
Nakano, Takayoshi
Title Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions
Journal name Corrosion Science   Check publisher's open access policy
ISSN 0010-938X
1879-0496
Publication date 2016-08
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.corsci.2016.03.019
Open Access Status Not Open Access
Volume 109
Start page 68
End page 85
Total pages 18
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2017
Language eng
Formatted abstract
Mg alloys are promising candidates for biodegradable materials. To control their dissolution rate, the orientation-dependent corrosion behaviour of pure-Mg single crystals was examined. The corrosion rates increased in the order (0001) < (1120) < (1010) < (1123) < (1012). We found the anodic reaction governs the orientation-dependent corrosion behaviour. The charge-transfer and film resistances were strongly orientation-dependent. Effects of Al or Cu-addition to the orientation-dependent corrosion behaviour were also examined as model materials. Al-addition promoted passivation in anodic polarization, while Cu-addition activated the cathodic reaction. However, neither Al nor Cu influenced the order of orientation-dependent corrosion behaviour. Such orientation-dependence may originate from the variation in surface atomic-packing density
Keyword A. Magnesium
B. Electrochemical impedance spectroscopy (EIS)
B. Polarization
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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