Tracking the corrosion of magnesium sand cast AM50 alloy in chloride environments |
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| Affiliation: | 1. Department of Chemistry and Surface Science Western, Western University, London, Ontario N5A 6B7, Canada;2. Department of Materials Science and Engineering, Brockhouse Institute for Materials Research and Canadian Centre for Electron Microscopy, McMaster University, Hamilton, Ontario, Canada;1. Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan;2. Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba-shi, Ibaraki 305-8565, Japan;3. Advanced Laser and Process Technology Research Association (ALPROT), 1-17-1 Tranomon 5, Minato-ku, Tokyo 105-0001, Japan |
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| Abstract: | An experimental procedure for tracking corrosion on lightweight alloys has been developed using a combination of microscopy and corrosion studies using commercial sand cast magnesium AM50 alloys. Corrosion penetration depths were measured and characterized with CLSM and SEM/XEDS, respectively. Corrosion depths on α-grains in the alloys were expressed as a function of their Al content. Al-rich β-phases and eutectic α-phase microstructures were observed to be most corrosion resistant due to an enrichment of Al, identified with TEM, near the oxide/alloy interface. Sand cast alloys were found to be susceptible to major corrosion events in regions with depleted Al content. |
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| Keywords: | A Magnesium A Alloy B SEM B TEM Confocal laser scanning microscopy |
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