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Mg–8Li–3Al+xCe alloys(x = 0.5wt%, 1.0wt%, and 1.5wt%) were prepared through a casting route in an electric resistance furnace under a controlled atmosphere. The cast alloys were characterized by X-ray diffraction, optical microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The corrosion behavior of the as-cast Mg–8Li–3Al+xCe alloys were studied under salt spray tests in 3.5wt% NaC l solution at 35°C, in accordance with standard ASTM B–117, in conjunction with potentiodynamic polarization(PDP) tests. The results show that the addition of Ce to Mg–8Li–3Al(LA83) alloy results in the formation of Al_2Ce intermetallic phase, refines both the α-Mg phase and the Mg_(17)Al_(12) intermetallic phase, and then increases the microhardness of the alloys. The results of PDP and salt spray tests reveal that an increase in Ce content to 1.5wt% decreases the corrosion rate. The best corrosion resistance is observed for the LA83 alloy sample with 1.0wt% Ce.
Mg-8Li-3Al + xCe alloys (x = 0.5 wt%, 1.0 wt%, and 1.5 wt%) were prepared through a casting route in an electric resistance furnace under a controlled atmosphere. The cast alloys were characterized by X-ray diffraction , optical microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The corrosion behavior of the as-cast Mg-8Li-3Al + xCe alloys were studied under salt spray tests in 3.5 wt% NaCl solution at 35 ° C , in accordance with standard ASTM B-117, in conjunction with potentiodynamic polarization (PDP) tests. The results show that the addition of Ce to Mg-8Li-3Al (LA83) alloy results in the formation of Al_2Ce intermetallic phase, refines both the α-Mg phase and the Mg_ (17) Al_ (12) intermetallic phase, and then increases the microhardness of the alloys. The results of PDP and salt spray tests reveal that an increase in Ce content to 1.5 wt% decreases the corrosion rate. The best corrosion resistance was observed for the LA83 alloy sample with 1.0 wt% Ce .