Abstract
We report that arsenic alloying significantly accelerates the corrosion process of Mg-Al alloy. The microstructure of Mg-Al-As alloy consists of α-Mg grains, β-Mg17Al12 particles, and Mg3As2 particles. Gravimetric tests revealed that the average corrosion rates of Mg-Al-As and AZ80 magnesium alloys are 75.48 mm/y and 7.06 mm/y. The acceleration of the corrosion process in Mg-Al-As alloy is mainly attributed to the Mg3As2 phase, which quickly hydrolyzes to form a Mg(OH)2 film.
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Wang, A., Jia, W., Cheng, C., Le, Q. C., & Yang, F. (2018). Effect of arsenic alloying on the microstructure and corrosion properties of Mg-Al alloy. International Journal of Electrochemical Science, 13(9), 9017–9028. https://doi.org/10.20964/2018.09.75
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