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

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.

» Author: Cheng Zhang, Liang Wu, Han Liu, Guangsheng Huang, Bin Jiang, Andrej Atrens, Fusheng Pan

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