Effects of Microstructure on Discharge Behavior of AZ91 Alloy as Anode for Mg–Air Battery

DOI Web Site Web Site 被引用文献3件 参考文献23件
  • Yuasa Motohiro
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology
  • Huang Xinsheng
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology
  • Suzuki Kazutaka
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology
  • Mabuchi Mamoru
    Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University
  • Chino Yasumasa
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology

書誌事項

タイトル別名
  • Effects of Microstructure on Discharge Behavior of AZ91 Alloy as Anode for Mg–Air Battery

この論文をさがす

抄録

The effects of precipitate distribution in commercial Mg alloys on the discharge behavior of a Mg–air battery were investigated. Rolled Mg–9 mass%Al–1 mass%Zn (AZ91) alloy sheets were selected as the anode. The discharge behaviors were evaluated by constant current discharge tests, and the corrosion behaviors were estimated by salt immersion tests and potentiodynamic polarization measurements. In the discharge tests, the peak-aged specimens exhibited much shorter discharge time than the solution-treated specimen. In the corrosion tests, the aged specimens exhibited quite a low corrosion rate as compared with the solution-treated specimen. From the potentiodynamic polarization measurements, the aged specimens showed a much lower corrosion current density and higher corrosion potential than the solution-treated specimen. It is suggested that a stable corrosion barrier by densely distributed β-phase precipitates contributed to both the reduction of discharge time and the suppression of corrosion rate for the aged specimens. Microstructural evaluations of the aged specimens revealed that fine β-phase precipitates were densely distributed throughout the specimens and that there was little Al-rich α phase, which would accelerate galvanic corrosion between the α matrix and the β phase. It was confirmed that the finely and homogenously distributed β phase in the aged AZ91 specimens acted as a barrier to the dissolution of the α-Mg matrix because a large Al-rich α phase was not distributed in the AZ91 specimens in this study.

収録刊行物

被引用文献 (3)*注記

もっと見る

参考文献 (23)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ