对比了铸态的与经固溶、退火和固溶+时效处理的Al-5Zn-0.02In-1Mg-0.05Ti合金金的显微组织, 分别测量四种组织状态合金的开路电位, 工作电位, 极化曲线和电化学阻抗 (EIS), 并用等效电路RL(CRp(QRd)(L1Ra1)(L2Ra2)) 进行了解析. 研究了不同组织状态对 Al-5Zn-0.02In-1Mg-0.05Ti合金电化学性能的影响. 结果表明: 经过退火处理的试样与铸态、固溶态和固溶+时效态试样相比, 第二相大小和数量适中、开路电位较负、工作电位稳定、电流效率最高且实际电容量最大.
The microstructure of Al-5Zn-0.02In-1Mg-0.05Ti alloys, which were the as cast, and the cast ones followed by heat treatments of solid solution, annealing and solid solution plus aging respectively, were comparatively examined. The open circuit potential, working potential, polarization curves and electrochemical impedance spectroscopy (EIS) of them were measured, and then their EIS was analyzed by the equivalent circuit RL(CRp(QRd)(L1Ra1)(L2Ra2)) . The effect of different heat treatments on microstructure and electrochemical performance of Al-Zn-In-Mg-Ti alloy anodes was revealed. The results showed that among the four alloys, the current efficiency and the actual capacitance of the annealed alloy were the highest, which were 83.5 % and 2391.03 respectively. That was to say that the amount and size of precipitates of the annealed alloy was moderate, so that the alloy exhibited a quite negative open circuit potential as well as a stable working potential.
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