Microstructure and corrosion behavior of Mg-Sc binary alloys in 3.5 wt.% NaCl solution

By Cheng Zhang, Liang Wu, Han-long Liu, Guangsheng Huang, Bin Jiang, A. Atrens, F. Pan. Corrosion Science, 2020

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This paper studied the microstructure and corrosion behavior of Mg-xSc binary alloy (x = 0.1–1.5 wt.%) sheets. Sc has a significant effect of refining grains of Mg. The Mg-Sc binary alloys had a single-phase microstructure for Sc concentrations between 0.1−0.3 wt.%, while there were Mg-Sc precipitates for higher Sc concentrations. The Sc additions obviously improved the corrosion resistance of pure Mg due to the refinement of microstructure and the formation of a more protective corrosion products film. The corrosion rate firstly decreased and then increased with increasing Sc concentration. Mg-0.3Sc has the lowest corrosion rate.

Subfields: Biomaterials, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/00dd51faa6d19c9e500dc4de78bebb1ffcf01ac7