NaCl 溶液中回收AZ31 镁合金的腐蚀和电化学特性 |
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引用本文:李贺超,祝向荣,汤文瑄,王金敏,张娅,陈秋荣.NaCl 溶液中回收AZ31 镁合金的腐蚀和电化学特性[J].上海第二工业大学(中文版),2019,(2):97-102 |
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基金项目:上海市高原学科- 环境科学与工程(资源循环科学与工程), 上海第二工业大学材料科学与工程重点学科
(XXKZD1601), 上海第二工业大学研究生项目基金(EGD17YJS029) 资助 |
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中文摘要:利用熔炼工艺, 将回收镁合金型材(RMA) 进行了制备。在回收过程中, 添加适量的Al、MnCl2, 最终得到合
金AZ31, 其中各元素质量分数如下: Al 3.31%、Zn 0.82%、Mn 0.27%、Fe 0.002%、Cu 0.004%、Ni 0.000 7%, 剩余为
Mg。研究了RMA 的结构、在NaCl 溶液中的腐蚀和电化学特性, 并与商业化镁合金(CMA) 进行了对比。X 射线衍
射仪和金相显微镜表明, RMA 和CMA 主要由镁基底组成, 另外还有少量的Mg17Al12 第二相。在NaCl 溶液中进行
的腐蚀试验和电化学特性研究表明, RMA 抗腐蚀特性差于CMA, 这可能与RMA 中有更多的第二相有关。将两种
合金作为镁电池原型器件的负极材料, 进行放电性能测试。结果表明, RMA 的放电时间和放电容量优于CMA。当
NaCl 电解质溶液浓度从0.6 mol/L 增加至0.9 mol/L 时, 两种合金材料的放电时间和放电容量都得到了增加。 |
中文关键词:回收镁合金 显微结构 腐蚀 电化学特性 |
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Corrosion and Electrochemical Performances of Recycled AZ31Magnesium Alloy in NaCl Solutions |
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Abstract:Recycled magnesium alloys (RMA) were prepared by smelting method. In the recycling process, alloy of AZ31 was obtained
by adding proper Al and MnCl2 and the mass fraction of each element was as follows: Al 3.31%, Zn 0.82%, Mn 0.27%, Fe 0.002%,
Cu 0.004%, Ni 0.0007% and the rest of Mg. The structure, corrosion and electrochemical properties in NaCl solutions of RMA were
investigated and compared to those of the commercial magnesium alloys (CMA). X-ray diffractometry and metallomicroscope show that
the main phases of RMA and CMA are Mg matrix and minor phases are second phases Mg17Al12. Due to more second phases, RMA
presents the worse anti-corrosion properties than CMA according to corrosion experiment and electrochemical properties in the solution
of NaCl. Two alloys were used as the anode materials for the prototype magnesium battery to test the discharge performance. The results
show that the discharge time and discharge capacity of RMA are better than CMA. When the concentration of NaCl electrolyte solution
increased from 0.6 mol/L to 0.9 mol/L, the discharge time and capacity of both alloys increased. |
keywords:recycled magnesium alloy micro-structure corrosion electrochemical performance |
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