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对不同Mn含量的Al-Ga-Mg-Sn-Mn阳极合金的组织和腐蚀形貌进行了观察和分析,并测试了该系列合金在4 mol/LNaOH溶液中的析氢速率、开路电位、电化学阻抗谱、放电曲线等,研究了Mn对Al-Ga-Mg-Sn阳极合金组织和电化学性能的影响。结果表明:在Al-0.1Ga-1Mg-0.1Sn基础上添加0.05%~0.15%(质量分数)Mn后,合金中第二相数目明显增多,Al阳极进一步活化,开路电位和工作电位负移,但同时造成自腐蚀析氢速率增大,Al-0.1Ga-1Mg-0.1Sn-0.1Mn合金具有较好的综合性能。
The microstructure and corrosion morphology of Al-Ga-Mg-Sn-Mn anode alloys with different content of Mn were observed and analyzed. The hydrogen evolution rate, open circuit potential, electrochemical Impedance spectroscopy, discharge curves, etc. The effect of Mn on the microstructure and electrochemical properties of Al-Ga-Mg-Sn anode alloys was investigated. The results show that the addition of 0.05% to 0.15% (mass fraction) Mn to Al-0.1Ga-1Mg-0.1Sn significantly increases the number of second phases, further activates the Al anode and negatively shifts the open circuit potential and working potential, But at the same time, the self-corrosion rate of hydrogen evolution increases. The Al-0.1Ga-1Mg-0.1Sn-0.1Mn alloy has good comprehensive properties.