Microstructure and electrochemical corrosion behavior of extruded Mg-Al-Pb-La alloy as anode for seawater-activated battery

被引：92
作者：
Shi, Yinchun [1 ]
Peng, Chaoqun [1 ]
Feng, Yan [1 ]
Wang, Richu [1 ]
Wang, Naiguang [1 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
来源：
MATERIALS & DESIGN | 2017年 / 124卷
基金：
美国国家科学基金会; 中国博士后科学基金;
关键词：
Magnesium anode; Extrusion; Grain orientation; Corrosion behavior; Discharge performance; CHLORIDE-ION CONCENTRATION; AZ91D MAGNESIUM ALLOY; HOT EXTRUSION; CA ALLOYS; PERFORMANCE; DISCHARGE; RESISTANCE; SN; PH; ENHANCEMENT;
D O I：
10.1016/j.matdes.2017.03.058
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A seawater-activated battery is a disposable reserve battery that is specifically designed to pollute less due to the absence or relatively less use of heavy metals. Mg-Al-Pb-La alloy is a typical anode material that is used in high power seawater-activated batteries. In this study, we use microstructure characterization to demonstrate that hot extrusion refines the grains of the alloy and leads to the formation of banded structures composed of the lamellar beta-Al11La3 and lump Al-Mn phases. Our electrochemical measurements reveal that the extruded Mg-Al-Pb-La alloy is a promising anode material that exhibits excellent discharge activity and high anodic efficiency at a large current density. Moreover, we also examine the correlation between the grain orientation induced by extrusion and the electrochemical corrosion behavior of Mg-Al-Pb-La alloy. We believe that our results can significantly contribute to the development of seawater-activated batteries. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：24 / 33
页数：10
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