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Magnesium based alloys with aluminum and zinc were obtained through electrochemical co-deposition from LiCl-NaCl-MgCl2 melt. The possibility of electrochemical co-deposition was discussed in detail by electro-analytical methods including cyclic voltametry, square wave voltametry, and chronopotentiometry. The co-deposition happens when the concentration of aluminum and zinc ions is kept at low value and the current density is high enough. The components of alloy elements can be controlled by fixing the components of the feeding salts. A laboratory experiment of the preparation by step-current co-deposition was also performed and certain compositions of the Mg-Al, and Mg-Zn were obtained. The alloys obtained from the co-deposition show a typical as-cast microstructure. The best conditions of electrolysis such as temperature, amount of addition and mode of feeding were discussed in detail. 相似文献
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采用循环伏安法、电位扫描法和阶跃电流法在973 K的LiCl-NaCl-MgCl_2-AlCl_3熔融盐体系中,对Mg-Al共沉积的可行性进行探讨。结果表明,当Al~(3+)阴极电化学过程为极限扩散控制时,Mg和Al可以在相同的电位下在阴极共同析出,合金理论沉积电压稳定在氯化镁的分解电压附近,随着电解的进行,阴极极化程度逐渐减小,导致槽电压降低。 相似文献
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离子交换树脂吸附技术在回收红土镍矿浸出液中镍、钴的应用方面还处于研究阶段,前期研究结果表明该技术可行,并给出了相应的工艺条件。本文在之前实验研究基础上,针对液相初始pH值优选范围是pH≥3的结论和树脂再生的条件和性能进行了进一步的实验,得出了更为成熟的结论。pH值对树脂吸附各金属容量影响的实验表明,将被吸附溶液pH值调节到4,再实施吸附工序较为合适;氢氧化钠浓度对树脂的再生性能影响的实验表明,先用硫酸解吸,再用氢氧化钠溶液转型可以实现树脂再生,采用的转型液氢氧化钠浓度为5%合适;树脂的再生性能检测实验表明,实验中采用的树脂经过多次再生后对溶液的镍、钴的吸附容量没有明显下降。 相似文献
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