Preparation of Mg-Yb alloy film by electrolysis in the molten LiCl-KCl-YbCl3 system at low temperature
来源期刊：Journal of Rare Earths2010年第1期
论文作者：陈野 叶克 张密林
文章页码：128 - 133
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.
陈野，叶克，张密林
Key Laboratory of Superlight Materials & Surface Technology,Ministry of Education,College of Materials Science and Chemical Engineering,Harbin Engineering University
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.
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