Schematic diagram illustrating the corrosion reaction in Mg–Li–Al–Ca alloy with and without β-Li phase

Chen He; Weihao Liu; Yan Yang; Yuyang Gao; Chen Wen; Guobing Wei; Bin Jiang; Xiaodong Peng; Fusheng Pan

Journal of Materials Research and Technology (May 2024)

Schematic diagram illustrating the corrosion reaction in Mg–Li–Al–Ca alloy with and without β-Li phase

Chen He,
Weihao Liu,
Yan Yang,
Yuyang Gao,
Chen Wen,
Guobing Wei,
Bin Jiang,
Xiaodong Peng,
Fusheng Pan

Affiliations

Chen He: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
Weihao Liu: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
Yan Yang: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China; Corresponding author.
Yuyang Gao: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China; Corresponding author.
Chen Wen: Beijing Spacecrafts Manufacturing Co., Ltd., Beijing, 100094, China; Corresponding author.
Guobing Wei: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China
Bin Jiang: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China
Xiaodong Peng: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China
Fusheng Pan: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

Journal volume & issue: Vol. 30
pp. 4510 – 4520

Abstract

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The effect of Li on the microstructure and corrosion behavior of extruded Mg-xLi-3Al-0.4Ca (x = 4,5,6,7) alloys were investigated by hydrogen evolution, potentiodynamic polarization measurement and electrochemical impedance spectroscopy measurement. The single-phase 4Li alloy with the largest α-Mg grain size and the strongest basal texture intensity exhibits the best corrosion resistance in 3.5 wt% NaCl solution. The duplex 6Li and 7Li alloys contain a protective LiOH film in the corrosion products, giving them better corrosion resistance than 5Li alloy. This study provides a new insight for the design and preparation of Mg–Li alloys with high corrosion resistance.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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