Journal
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 106, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.msec.2019.110013
Keywords
Directional solidification; Mg alloy; Grain morphology; Degradation behavior; Hank's solution
Categories
Funding
- National Key Research and Development Program of China [2017YFB0103904]
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The degradation behavior of Mg-4 wt% Zn alloy with three different microstructures was examined in Hank's solution at 37 degrees C by electrochemical measurements and immersion tests in this study. The results show that the sample with cellular structure exhibits a more positive corrosion potential, lower corrosion current density, larger impedance and more protective film than samples with columnar dendritic and equiaxed dendritic structure. The higher corrosion resistance is attributed to the preferred orientation, eliminating susceptible grain boundaries and reduced secondary phases.
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