Review of the atmospheric corrosion of magnesium alloys

Mg atmospheric corrosion is induced by a thin surface aqueous layer. Controlling factors are microgalvanic acceleration between different phases, protection by a continuous second phase distribution, protection by corrosion products, and degradation of protective layers by aggressive species such as...

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Bibliographic Details
Published in:	Journal of materials science & technology Vol. 35; no. 9; pp. 2003 - 2016
Main Authors:	Liu, Hongguang, Cao, Fuyong, Song, Guang-Ling, Zheng, Dajiang, Shi, Zhiming, Dargusch, Mathew S., Atrens, Andrej
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-09-2019
Subjects:	Atmospheric corrosion Magnesium Magnesium alloys Magnesium alloys Magnesium Atmospheric corrosion
Online Access:	Get full text
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Summary:	Mg atmospheric corrosion is induced by a thin surface aqueous layer. Controlling factors are microgalvanic acceleration between different phases, protection by a continuous second phase distribution, protection by corrosion products, and degradation of protective layers by aggressive species such as chloride ions. The Mg atmospheric corrosion rate increases with relative humidity (RH) and concentrations of aggressive species. Temperature increases the corrosion rate unless a protective film causes a decrease. O2, SO2 and NO2 accelerate the atmospheric corrosion rate, whereas the corrosion rate is decreased by CO2. The traditional gravimetric method can evaluate effectively the corrosion behavior of Mg alloys.
ISSN:	1005-0302 1941-1162
DOI:	10.1016/j.jmst.2019.05.001