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Unique corrosion resistance of ultrahigh pressure Mg-25Al binary alloys.

Feng, Jiawen; Li, Hanning; Deng, Kunkun; Fernandez, Carlos; Zhang, Qingrui; Peng, Qiuming


Jiawen Feng

Hanning Li

Kunkun Deng

Qingrui Zhang

Qiuming Peng


Differing from as-cast and solid-solution alloys with coarse eutectic phases (Mg17Al12), a single-phase structure is attained in Mg-25wt.%Al alloy after ultrahigh-pressure solid-solution (USS, 800 oC, 4GPa). This USSed Mg-25wt.%Al sample exhibits a prominent age-hardening response due to the nano-scaled Mg17Al12 particles. Three testing methods confirm that USS-aged Mg-25wt.%Al alloy shows good corrosion resistance, which overwhelms the majority of Mg-based alloys reported so far, near to high purity Mg. The main reason is attributed to the formation of Al-rich oxide layer, wherein residual stress and pitting corrosion are eliminated. It provides a new avenue for developing corrosion resistant Mg alloys.


FENG, J., LI, H., DENG, K., FERNANDEZ, C., ZHANG, Q. and PENG, Q. 2018. Unique corrosion resistance of ultrahigh pressure Mg-25Al binary alloys. Corrosion science [online], 143, pages 229-239. Available from:

Journal Article Type Article
Acceptance Date Aug 7, 2018
Online Publication Date Aug 15, 2018
Publication Date Oct 31, 2018
Deposit Date Aug 16, 2018
Publicly Available Date Aug 16, 2019
Journal Corrosion science
Print ISSN 0010-938X
Electronic ISSN 1879-0496
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 143
Pages 229-239
Keywords MgAl alloy; Ultrahigh pressure; Corrosion properties
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