Overcoming the reduction of current efficiency and stacking of corrosion products on the surface of Al–Zn–In sacrificial anodes after long‐term use is of great significance for Al–Zn–In alloy as an anode material for cathodic protection of steel structures in seawater. In this study, four different sacrificial anode materials were prepared based on the Al‐6Zn‐0.03In (wt%) alloy without and with the addition of alloying elements of Sn, Cd, and Si, respectively. The influence of the addition of Sn, Cd, and Si on the microstructure and electrochemical performance of the Al–Zn–In anode was investigated by optical microscopy and electrochemical measurements. The results show that the introduction of Sn, Cd, and Si changes the microdendrite structure of Al–Zn–In to equiaxed grain. The added Sn, Cd, and Si alloys have more negative and stable working potential and uniformly dissolved morphology. The actual capacity and current efficiency of aluminum alloys increase from 2,000.6 Ah/kg and 70.7% of Al–Zn–In alloy to 2,539.4 Ah/kg and 88.6% of Al–Zn–In–Sn, 2,437.3 Ah/kg and 85.5% of Al–Zn–In–Cd and 2,500.4 Ah/kg and 88.8% of Al–Zn–In–Si alloys, respectively.

中文翻译：

---

添加锡，镉和硅对牺牲阳极中铝锌锌电化学性能的影响

长期使用后，克服电流效率的降低和Al-Zn-In牺牲阳极表面腐蚀产物的堆积对于Al-Zn-In合金作为阳极材料对海水中钢结构进行阴极保护具有重大意义。在这项研究中，基于Al-6Zn-0.03In（wt％）合金制备了四种不同的牺牲阳极材料，分别没有和分别添加了Sn，Cd和Si合金元素。通过光学显微镜和电化学测量研究了锡，镉和硅的添加对Al-Zn-In阳极的微观结构和电化学性能的影响。结果表明，Sn，Cd和Si的引入将Al-Zn-In的微枝晶结构转变为等轴晶。添加的锡，镉，和硅合金具有更大的负性和稳定的工作电势以及均匀地溶解的形貌。铝合金的实际容量和电流效率从2,000.6 Ah / kg和Al-Zn-In合金的70.7％增加到2,539.4 Ah / kg和Al-Zn-In-Sn的88.6％，2,437.3 Ah / kg和85.5％ Al–Zn–In–Cd和2,500.4 Ah / kg和88.8％的Al–Zn–In–Si合金。