期刊
出版社
ELSEVIER
DOI: 10.1016/j.msec.2019.110013
关键词
Directional solidification; Mg alloy; Grain morphology; Degradation behavior; Hank's solution
资金
- National Key Research and Development Program of China [2017YFB0103904]
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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