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Journal of Materials Engineering and Performance

, Volume 27, Issue 12, pp 6552–6563 | Cite as

Effect of Lithium on the Discharge and Corrosion Behavior of Mg-3 wt.% Al Alloy as the Anode for Seawater Activated Battery

  • Ri-chu Wang
  • Qi Li
  • Nai-guang WangEmail author
  • Chao-qun Peng
  • Yan Feng
Article
  • 47 Downloads

Abstract

The discharge and corrosion behavior of Mg-3 wt.% Al alloys added with different contents of lithium in 3.5 wt.% NaCl aqueous solution is studied by electrochemical methods and microstructure characterization. The results indicate that adding 4 wt.% lithium severely promotes the self-corrosion and the addition of 12 wt.% lithium is not valuable to the spalling of discharge products. In contrast, doping Mg-3 wt.% Al with 8 wt.% lithium negatively shifts the discharge potentials and inhibits the self-discharge, attributed to the dual-phase structure of α-Mg plus β-Li that removes the discharge products and favors the uniform dissolution in the course of discharge. Moreover, the multi-pass rolling with 40% reduction could tailor the microstructure of Mg-3 wt.% Al-8 wt.% Li alloy and further enhance its discharge activity, even though the corrosion resistance is slightly reduced. This means that the rolled Mg-3 wt.% Al-8 wt.% Li sheet is suitable to serve as the anode for seawater activated battery.

Keywords

discharge performance Mg-3% Al alloy seawater activated battery self-corrosion 

Notes

Acknowledgments

Authors acknowledge the financial support of the National Nature Science Foundation of China (No. 51401243), a Special Financial Grant from the China Postdoctoral Science Foundation (No. 2015T80883), and China Postdoctoral Science Foundation (No. 2014M552151).

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Copyright information

© ASM International 2018

Authors and Affiliations

  • Ri-chu Wang
    • 1
  • Qi Li
    • 1
  • Nai-guang Wang
    • 2
    Email author
  • Chao-qun Peng
    • 1
  • Yan Feng
    • 1
  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaChina
  2. 2.School of Materials and EnergyGuangdong University of TechnologyGuangzhouChina

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