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利用恒电流从碱性镀液中在Al/Pb表面电化学合成α-PbO 2沉积层,制备出Al/Pb/α-PbO 2复合惰性阳极材料。通过阳极极化法考察α-PbO 2镀液组成及镀液温度对在Al/Pb表面电化学合成α-PbO 2的影响,采用XRD和SEM分别测试Al/Pb基体材料及α-Pb O2沉积层的相结构和表面微观组织特征。结果表明:α-PbO 2的电化学合成分由几个不同的步骤完成;适宜的条件能有效提高α-Pb O2电化学合成速率并避免析氧副反应的发生;从碱性溶液中合成的α-Pb O2具有斜方晶型结构,沉积层由发育良好的圆球形晶胞构成。
The Al / Pb / α-PbO 2 composite inert anode material was prepared by electrochemical synthesis of α-PbO 2 deposition layer on Al / Pb surface from alkaline solution by galvanostatic current. The effects of α-PbO 2 bath composition and bath temperature on the electrochemical synthesis of α-PbO 2 on Al / Pb surface were investigated by anodic polarization. The Al / Pb matrix and α-Pb O2 deposition were measured by XRD and SEM Layer phase structure and surface microstructure characteristics. The results show that the electrochemical synthesis of α-PbO 2 can be accomplished by several different steps. The suitable conditions can effectively increase the electrochemical synthesis rate of α-Pb O 2 and avoid the occurrence of oxygen evolution side reactions. α-Pb O2 has a rhombohedral structure, and the sedimentary layer is composed of well-developed spherical unit cells.