Influence of pulse current on the voltage delay of AZ21 magnesium electrode

DENG Ling; CHEN Lin; YANG Qiao-ling; CHEN Chang-guo

doi:10.13374/j.issn2095-9389.2015.10.016

Volume 37 Issue 10

Jul. 2021

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DENG Ling, CHEN Lin, YANG Qiao-ling, CHEN Chang-guo. Influence of pulse current on the voltage delay of AZ21 magnesium electrode[J]. Chinese Journal of Engineering, 2015, 37(10): 1358-1363. doi: 10.13374/j.issn2095-9389.2015.10.016

Citation:

DENG Ling, CHEN Lin, YANG Qiao-ling, CHEN Chang-guo. Influence of pulse current on the voltage delay of AZ21 magnesium electrode[J]. Chinese Journal of Engineering, 2015, 37(10): 1358-1363. doi: 10.13374/j.issn2095-9389.2015.10.016

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Influence of pulse current on the voltage delay of AZ21 magnesium electrode

doi: 10.13374/j.issn2095-9389.2015.10.016

1. College of Chemistry and Chemical Engineering,Chongqing University, Chongqing 400044, China;
2. College of Material and Chemical Engineering,Sichuan University of Science and Engineering, Zigong 643000, China;
3. Sichuan Provincial Key Laboratory of Materials Corrosion and Protection, Zigong 643000, China

Received Date: 2014-05-25

Abstract

Abstract

A surface film generates on AZ21 magnesium alloy in magnesium sulfate solutions,resulting in serious voltage delay.Pulse current is conducive to the application of AZ21 magnesium alloy in a battery,for it can shorten the lag time,reduce the initial discharge voltage drop and increase the discharge stability. The voltage delay of AZ21 magnesium alloy in a 2 mol·L^-1 MgSO₄ solution was investigated by chronopotentiometry,multi-current steps,electrochemical impedance measurement,and scanning electron microscopy. After a 50 mA pulse current was applied for 1 s,the voltage lag time of AZ21 magnesium alloy decreased from 6.35 s(3.23 V) to 0.59 s(0.034 V).
- magnesium alloys,
- surface films,
- voltage,
- delay,
- pulse current