Preparation of Mg-Yb alloy film by electrolysis in the molten LiCl-KCl-YbCl3 system at low temperature

被引：0
作者：
陈野 [1 ]
叶克 [1 ]
张密林 [1 ]
机构：
[1] Key Laboratory of Superlight Materials & Surface Technology,Ministry of Education,College of Materials Science and Chemical Engineering,Harbin Engineering University
来源：
Journal of Rare Earths | 2010年 / 28卷 / 01期
基金：
中国国家自然科学基金;
关键词：
LiCl-KCl eutectic; molten salt; Mg-Yb alloy films; electrolysis; low temperature; rare earths;
D O I：
暂无
中图分类号：
TG174.44 [金属复层保护];
学科分类号：
080503 ;
摘要：
The electrochemical behavior of Yb3+ and electrodeposition of Mg-Yb alloy film at solid magnesium cathode in the molten LiCl-KCl-YbCl3(2 wt.%) system at 773 K was investigated.Transient electrochemical techniques,such as cyclic voltammetry,chronopotentiometry and chronoamperometry were used in order to explore the deposition mechanism of Yb.The reduction process of Yb3+ is stepwise reactions which are single-electron and double-electron reversible charge transfer reactions.The speed control step was a diffusion-controlled step which is caused by concentration polarization.The microstructures of Mg-Yb alloy film were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and EPMA area analysis.A very thin Mg2Yb alloy film(～200 nm) was formed by potentiostatic electrolysis at ?1.85 V(vs.Ag/AgCl) for 12 h.A much thicker Mg2Yb alloy film(～450 μm) was obtained at ?2.50 V(vs.Ag/AgCl) for 2.5 h.The corrosion resistance of magnesium can be enhanced by electrochemical formation of Mg-Yb alloy film on its surface.
引用
收藏
页码：128 / 133
页数：6
相关论文
共 6 条
  • [1] The effect of alloy composition on the microstructure and tensile properties of binary Mg-rare earth alloys
    Chia, T. L.
    Easton, M. A.
    Zhu, S. M.
    Gibson, M. A.
    Birbilis, N.
    Nie, J. F.
    [J]. INTERMETALLICS, 2009, 17 (07) : 481 - 490
  • [2] Co-reduction of aluminium and lanthanide ions in molten fluorides: Application to cerium and samarium extraction from nuclear wastes[J] . M. Gibilaro,L. Massot,P. Chamelot,P. Taxil.Electrochimica Acta . 2009 (22)
  • [3] Electrochemistry of ytterbium (III) in molten alkali metal chlorides
    Smolenski, V.
    Novoselova, A.
    Osipenko, A.
    Caravaca, C.
    de Cordoba, G.
    [J]. ELECTROCHIMICA ACTA, 2008, 54 (02) : 382 - 387
  • [4] Electrochemical formation of Yb–Ni alloy films by Li codeposition method in a molten LiCl–KCl–YbCl 3 system[J] . Takahisa Iida,Toshiyuki Nohira,Yasuhiko Ito.Electrochimica Acta . 2003 (11)
  • [5] POWDER CELL – a program for the representation and manipulation of crystal structures and calculation of the resulting X‐ray powder patterns[J] . W. Kraus,G. Nolze.J. Appl. Cryst. . 1996 (3)
  • [6] Electrolytic magnesium production and its hydrodynamics by using a Mg-Pb alloy cathode. Demirci G,Karakaya I. Jour- nal of Alloys and Compounds . 2008
1