改变Al-Zn-In-Cd合金牺牲阳极杂质铁的含量, 在20 ℃天然海水中研究其电化学性能。采用4 d加速试验法测定了开路电位、闭路电位和电化学容量及电流效率，并采用循环伏安法研究了牺牲阳极的极化性能。结果表明，铁含量的变化对Al-Zn-In-Cd牺牲阳极开路电位以及闭路电位影响较小，而对牺牲阳极电流效率的影响较为显著。随着铁元素含量的增加，电流效率呈现下降趋势，但是在0.15%范围内仍可达到国标的要求，电流效率大于85%，且溶解形貌良好。循环伏安曲线表明，Al-Zn-In-Cd牺牲阳极极化性能良好。

The electrochemical performance of Al-Zn-In-Cd sacrificial anodes with different concentrations of Fe was studied in natural seawater at 20 ℃. Open circuit potential, closed circuit voltage, electrochemical capacity and current efficiency were determined by 4 days accelerated experiment method. Cyclic voltammetry method was used to study the sacrificial anode polarization performance. The results showed that the open circuit potential and closed circuit voltage of the Al-Zn-In-Cd sacrificial anodes were affected little by Fe concentration, but the current efficiency was affected a lot. The current efficiency decreased as the concentration of Fe increased and was bigger than 85% when Fe concentration was not more than 0.15 %. And the dissolution morphology of all samples were good. Cycle volt-ampere curves showed that the Al-Zn-In-Cd sacrificial anode had good polarization performance.