通过测量极化曲线、电化学阻抗谱和恒流极化曲线,研究了氯离子浓度和溶液温度对铝空气电池负极腐蚀性能和放电性能的影响.结果表明: 当氯化钠溶液浓度为3.5%时, 铝合金腐蚀速率最快,随着氯化钠溶液浓度升高, 铝合金恒流极化稳定电位负移, 极化减小.溶液温度升高, 加快了铝合金的腐蚀. 当溶液温度为50℃时,由于铝合金表面有腐蚀产物层的生成, 腐蚀速度略有降低.当溶液温度为40℃时, 铝合金表现出最低的恒流极化稳定电位.
Effects of chloride ion concentration and temperature on the anode performance of aluminum/air batteries were studied by polarization curves, electrochemical impedance spectroscopy(EIS) and galvanostatic potential-time curves. The results showed that the aluminum alloy exhibited the fastest corrosion rate when the chloride ion concentration was 3.5%. The potential shifted to negative direction and polarization became weaker when the chloride ion concentration of the solutions increased. The corrosion rate of aluminum alloy increased when the temperature of the solutions increased. The corrosion rate is slightly lower at 50℃ due to the formation of corrosion products layer. The aluminum alloy exhibited the lowest potential when the temperature was 40℃.
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