添加剂对铝阳极电化学性能的影响

选择SnCl2和ZnCl2作为中性溶液中的添加剂进行研究,中性母液为0.5mol/L NaCl,Al-In合金电极为工作电极。采用多种电化学实验方法测试各种添加剂对Al-In电极在中性及碱性电解液内的阳极极化曲线、析氢曲线、阳极利用率、开路电压、自腐蚀电位的影响。结果表明,引入的添加剂均能不同程度地提高Al-In阳极电化学性能,使腐蚀电位负移,抑制析氢反应的发生,提高阳极利用率。

Effect of additives on the electrochemical performance of Al anode

ZnCl2 and SnCl2 as the additives of the neutral solution were selected.Many electrochemical tests were carried out to study anodic polarizing curve,H2-evolutive curve,open-circuit voltage,self-corrode voltage and the anodic utilization ratio.The results show that activation mechanism for Al-In anode is abided by the "dissolution-deposition" mechanism in neutral solution.Furthermore,the functions of the additives on the Al-In alloy are not identical.With making corrosive potential decrease,activating Al anode,restraining the H2-evolutive,and improving the anodic utilization ratio,all of them have positive effects on Al anode.