CAJ | 학술논문

通过光学显微镜(OM)、扫描电镜(SEM)、能谱分析(EDAX)和电化学性能测试等方法,研究了Ga和Bi对Al-7Zn-0.1Sn(质量分数,％)牺牲阳极微观组织和电化学性能的影响.Al-Zn-Sn合金加入Ga和Bi元素后,合金组织由粗大枝晶转变为等轴晶,仅剩下少量枝晶.Al-7Zn-0.1Sn-0.015Ga-0.1Bi合金具有高的电流效率(97％)和均匀的腐蚀形貌,表明添加适量的Ga和Bi元素能有效改善Al-Zn-Sn合金的组织和电化学性能.
통과광학현미경(OM)、소묘전경(SEM)、능보분석(EDAX)화전화학성능측시등방법,연구료Ga화Bi대Al-7Zn-0.1Sn(질량분수,％)희생양겁미관조직화전화학성능적영향.Al-Zn-Sn합금가입Ga화Bi원소후,합금조직유조대지정전변위등축정,부잉하소량지정.Al-7Zn-0.1Sn-0.015Ga-0.1Bi합금구유고적전류효솔(97％)화균균적부식형모,표명첨가괄량적Ga화Bi원소능유효개선Al-Zn-Sn합금적조직화전화학성능.
The influence of Ga and Bi on the microstructure and electrochemical performance of Al-7Zn-0.1Sn (mass fraction,％)sacrificial anodes was investigated by means of optical microscopy (OM),scanning electron microscopy/energy dispersive X-ray analysis (SEM/EDAX) and electrochemical measurements.It was found that the coarse dendrites structure transformed into the equiaxed grains as well as a small amount of dendrite grains after adding Ga and Bi into Al-Zn-Sn alloys.A high current efficiency of 97％ and even corrosion morphology were obtained for Al-7Zn-0.1Sn-0.015Ga-0.1 Bi alloy.The results indicate that the proper amount of Ga and Bi is effective on improving the microstructure and electrochemical performance of Al-Zn-Sn alloy.