Effects of the addition of Na2SnO3 to NaCl electrolytes on Mg‐14Li‐3Al‐1Gd electrode electrochemical behavior. Issue 4 (10th December 2019)

• Record Type: Journal Article
• Authors: Li, Guangyu; Su, Jinhao; Zhao, Xinyue; Chen, Shixing; Wu, Ruizhi; Wang, Guixiang
• Is Part Of: Materials and corrosion. Volume 71:Issue 4(2020)
• Page Start: 564
• Page End: 570
• Publication Date: 2019-12-10
• Subjects: electrode -- electrolyte additive -- Mg‐14Li‐3Al‐1Gd alloy -- sodium stannate; Materials -- Periodicals; Metals -- Periodicals; Corrosion and anti-corrosives -- Periodicals; 620.1122305
• DOI: 10.1002/maco.201911309
• Languages: English
• ISSNs: 0947-5117

Abstract

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 Na2 SnO3 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 Na2 SnO3 to a 0.7 M NaCl solution increases the corrosion potential of the Mg‐14Li‐3Al‐1Gd electrodes. Samples with 0.1 mM Na2 SnO3 retained the highest discharging current density and lowest polarization resistance of all the specimens. Electrodes in an electrolyte solution mixed with 0.1 mM Na2 SnO3 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 Na2 SnO3 is 0.1 mM. Abstract : Mg‐14Li‐3Al‐1Gd electrodes discharged in a 0.7 M NaCl electrolyte solution involving varied concentrations of Na2 SnO3 at room temperature. The additives improved the corrosion resistance and discharge current density of Mg‐14Li‐3Al‐1Gd electrodes. In the presence of additives, it is easier to expand the effective discharge area. Among all concentrations of the specimens, the one with 0.1 mM showed the best development.