L-半胱氨酸/ZnO缓蚀剂对3102铝合金在碱性溶液中电化学性能的影响

Influences of Inhibitor L-Cysteine/zinc Oxide on Electrochemical Performance of 3102 Al-alloy in Alkaline Solution

选用防锈铝合金3102作为铝空气电池阳极材料,研究有机/无机复合缓蚀剂L-半胱氨酸/Zn O对3102铝合金在4 mol/L Na OH溶液中腐蚀及放电性能的影响。结果表明:复合缓蚀剂明显降低了3102铝合金的自腐蚀速率。在Na OH及Na OH/L-半胱氨酸溶液中,铝阳极溶解由电荷转移控制;而在含Zn O的溶液中,铝阳极的溶解由锌盐及腐蚀产物的扩散控制。在4 mol/L Na OH碱性溶液中添加L-半胱氨酸/Zn O复合缓蚀剂,3102铝合金作为阳极材料的铝空气电池的放电性能明显得到改善。

The severe corrosion of Al-anode is the main barrier preventing the application of Al for air battery with alkaline solution. In this paper, the influence of organic/inorganic compound inhibitor of LCysteine/Zn O on the corrosion and electrochemical performance of 3102 Al-alloy were examined in 4 mol/L alkaline solutions. Results show that the corrosion of 3102 Al-alloy is significantly restrained by the L-Cysteine/Zn O compound inhibitor. The dissolution of Al-anode is mainly controlled by the charge-transfer in Na OH and Na OH L-Cysteine solutions, but in Na OH/Zn O and Na OH/L-Cysteine/Zn O solutions, the discharge is mainly controlled by the diffusion of the zincate ions and corrosion products. By adding L-Cysteine/Zn O compound inhibitor in 4 mol/L Na OH alkaline solution, the discharging performance of aluminum air battery with 3102 Al-anode was improved obviously.