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Atmospheric corrosion of AM60 Mg alloys in an industrial city environment

Authors
Journal
Corrosion Science
0010-938X
Publisher
Elsevier
Volume
69
Identifiers
DOI: 10.1016/j.corsci.2012.11.022
Keywords
  • A. Magnesium
  • B. Sem
  • B. Xrd
  • C. Atmospheric Corrosion
  • C. Pitting Corrosion

Abstract

Graphical abstract The conglomeration states of the dust particles had a great effect on the initial atmospheric corrosion behaviour of the AM60 Mg alloy. The larger pit like one in site A was caused by the conglomeration of many dust particles with rough surfaces, whereas the smaller pit like one in site B resulted from the unconglomerated particles or single ones with smoother surfaces. Consequently, the pit sizes were relative to the conglomerate states of the particles on the alloy. Highlights ► Atmospheric corrosion behaviour of AM60 Mg alloys was studied. ► The sizes of dust particle conglomerates were related to the sizes of pits. ► Corrosion rate of the ingot was higher than that of the extruded samples. ► The main corrosion products of both alloys were MgSO4·6H2O and MgSO3·6H2O. ► The extruded alloy with uniform microstructures showed a lower corrosion rate.

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