Abstract
Tafel polarization curves and electrochemical impedance spectroscopy(EIS) techniques were employed to investigate the corrosion electrochemical behavior of AZ31 and AZ61 magnesium alloys.Scanning electron microscopy(SEM) was used to observe the alloy microstructure and corrosion morphology.The variation of the bulk corrosive medium pH with immersion time was recorded during the exposure of the alloys to simulated sea water.Results show that AZ61 magnesium alloy exhibits much better anti-corrosion ability than AZ31 magnesium alloy.The different corrosion behavior between the two magnesium alloys is correlated with their different content of Al alloying element.The higher content of Al in AZ61 alloy leads to the homogenerous microstructure and the strong surface passivation,which is helpful for improving the alloy corrosion resistance.
Keywords
magnesium alloy, simulated sea water, corrosion, alloying element
Publication Date
2008-02-28
Online Available Date
2008-02-28
Revised Date
2008-02-28
Received Date
2008-02-28
Recommended Citation
Ling-jie LI, Sheng-hai YU, Jing-lei LEI, Chuan-pu LIU, Sheng-tao ZHANG, Fu-sheng PAN.
Corrosion Electrochemical Behavior of AZ31 and AZ61 Magnesium Alloys in Simulated Sea Water[J]. Journal of Electrochemistry,
2008
,
14(1): 95-99.
DOI: 10.61558/2993-074X.1871
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol14/iss1/20
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