Mitigating the detrimental effects of galvanic corrosion by nanoscale composite architecture design
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In: npj Materials degradation, Vol. 47.2022, No. 6, 16.06.2022.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Mitigating the detrimental effects of galvanic corrosion by nanoscale composite architecture design
AU - Renk, Oliver
AU - Weißensteiner, Irmgard
AU - Cihova, Martina
AU - Steyskal, Eva-Maria
AU - Sommer, Nicole
AU - Tkadletz, Michael
AU - Pogatscher, Stefan
AU - Schmutz, P.
AU - Eckert, Jürgen
AU - Uggowitzer, Peter
AU - Pippan, Reinhard
AU - Weinberg, Annelie M.
PY - 2022/6/16
Y1 - 2022/6/16
N2 - Widespread application of magnesium (Mg) has been prevented by its low strength and poor corrosion resistance. Core of this limitation is Mg’s low electrochemical potential and low solubility for most elements, favoring secondary phase precipitation acting as effective micro-galvanic elements. Mg-based metal–metal composites, while benefiting strength, are similarly active galvanic couples. We show that related detrimental corrosion susceptibility is overcome by nanoscale composite architecture design. Nanoscale phase spacings enable high-strength Mg–Fe composites with degradation rates as low as ultra-high purity Mg. Our concept thus fundamentally changes today’s understanding of Mg’s corrosion and significantly widens the property space of Mg-based materials.
AB - Widespread application of magnesium (Mg) has been prevented by its low strength and poor corrosion resistance. Core of this limitation is Mg’s low electrochemical potential and low solubility for most elements, favoring secondary phase precipitation acting as effective micro-galvanic elements. Mg-based metal–metal composites, while benefiting strength, are similarly active galvanic couples. We show that related detrimental corrosion susceptibility is overcome by nanoscale composite architecture design. Nanoscale phase spacings enable high-strength Mg–Fe composites with degradation rates as low as ultra-high purity Mg. Our concept thus fundamentally changes today’s understanding of Mg’s corrosion and significantly widens the property space of Mg-based materials.
U2 - 10.1038/s41529-022-00256-y
DO - 10.1038/s41529-022-00256-y
M3 - Article
VL - 47.2022
JO - npj Materials degradation
JF - npj Materials degradation
SN - 2397-2106
IS - 6
ER -
