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以Al-Zn-Sn-Ga-Bi铸态、退火态、轧制态和再结晶态阳极合金为对象,研究再结晶退火对合金电化学性能的影响。通过测试不同状态下的阳极材料在4 mol/L NaOH溶液中的电化学性能,初步探讨冷变形和再结晶过程对铝阳极自腐蚀速率、析氢速率、开路电位的影响,结果发现:80%变形量的再结晶退火能够较大幅度地提高合金的电化学性能。借助金相分析技术和极化曲线分析了铝阳极材料的微观组织结构及其对铝阳极腐蚀溶解机理的影响。
The effects of recrystallization annealing on the electrochemical properties of Al-Zn-Sn-Ga-Bi as-cast, annealed, rolled and recrystallized anodic alloys were investigated. The effects of cold deformation and recrystallization on the corrosion rate, hydrogen evolution rate and open circuit potential of aluminum anode were investigated by testing the electrochemical performance of the anode material in 4 mol / L NaOH solution. The results showed that 80% deformation The amount of recrystallization annealing can greatly improve the electrochemical properties of the alloy. The microstructure of aluminum anode material and its influence on the dissolution mechanism of aluminum anode were analyzed by metallographic analysis and polarization curves.