Assessment of localized corrosion under simulated physiological conditions of magnesium samples with heterogeneous microstructure: Value of X-ray computed micro-tomography platform

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Authors

ROČNÁKOVÁ Ivana MONTUFAR Edgar B. HORYNOVÁ Miroslava ZIKMUND Tomáš NOVOTNÝ Karel KLAKURKOVÁ Lenka ČELKO Ladislav SONG Guang-Ling KAISER Jozef

Year of publication 2016
Type Article in Periodical
Magazine / Source Corrosion Science
MU Faculty or unit

Faculty of Science

Citation
Web http://www.sciencedirect.com/science/article/pii/S0010938X15301876
Doi http://dx.doi.org/10.1016/j.corsci.2015.12.009
Field Analytic chemistry
Keywords Magnesium; X-ray microtomography; Weight loss; Polarization; X-ray diffraction; Selective oxidation
Description Accurate assessment of magnesium degradation is crucial for the development of safe medical devices. X-ray computed microtomography is one of the methods that are recently used to evaluate the corrosion of magnesium. This work validates the potential of this method to discern the different corrosion rates of different surfaces of a magnesium coupon, representing a real advantage of this technique over other methodologies that only evaluate the overall corrosion behaviour. The results also show that magnesium corrodes faster in zones with high twin density and that its corrosion product formation varies in different simulated physiological fluids.
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