辅助阳极是电子防腐蚀系统的关键部件之一，为提高其性能及寿命，利用热分解法制备了Ru-Ir-Sn-Ti混合氧化物涂层钛基阳极，用SEM，XRD，动电位极化曲线、强化电解寿命试验和热水器内胆电子防腐蚀试验考察了不同Sn含量的混合氧化物涂层钛电极的性能。结果表明：Ru-Ir-Sn-Ti混合氧化物涂层覆盖良好，呈均匀龟裂状；添加适量的Sn能提高涂层的电化学活性，含10％（摩尔分数）Sn涂层的电化学性能最优；含30％（摩尔分数）sn涂层的强化电解寿命达58h；混合氧化物涂层钛阳极在输入很小的电压时，能有效防止水下搪瓷碳钢在高硬度热水中的腐蚀，且能使阴极材料表面沉淀一层钙质层，增强了保护效果。
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