Effects of the addition of Na₂SnO₃ to NaCl electrolytes on Mg‐14Li‐3Al‐1Gd electrode electrochemical behavior

Abstract

We report on the electrochemical performance of Mg‐14Li‐3Al‐1Gd electrodes prepared by the accumulation roll bonding technique in a 0.7 M NaCl solution. To explore the effects of adding different concentrations of Na2SnO3 to 0.7 M NaCl solutions, potentiodynamic polarization, potentiostatic oxidation, electrochemical impedance spectroscopy, and scanning electron microscopy were utilized. The results show that the addition of Na2SnO3 to a 0.7 M NaCl solution increases the corrosion potential of the Mg‐14Li‐3Al‐1Gd electrodes. Samples with 0.1 mM Na2SnO3 retained the highest discharging current density and lowest polarization resistance of all the specimens. Electrodes in an electrolyte solution mixed with 0.1 mM Na2SnO3 presented a larger active reaction area, deeper channels, and higher discharging currents than those with other additive concentrations. In conclusion, to improve the electrochemical behavior of Mg‐14Li‐3Al‐1Gd electrodes in a 0.7 M NaCl solution, the optimal concentration of Na2SnO3 is 0.1 mM.

Layer-by-Layer Self-Assembly Composite Coatings for Improved Corrosion and Wear Resistance of Mg Alloy for Biomedical Applications

“…Furthermore, the corrosion products with porous and loose structure on Mg alloy substrate cannot slow down the corrosion process [13]. The rapid corrosion results in the early loss of mechanical stability, thereby the structural failure of Mg alloys [14][15][16][17]. Hence, it is of importance to improve the corrosion resistance for its potential applications [18].…”