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    题名: Electrochemistry of Zn(II)/Zn on Mg alloy from the N-butyl-N-methylpyrrolidinium dicyanamide ionic liquid
    作者: Deng,MJ;Lin,PC;Chang,JK;Chen,JM;Lu,KT
    贡献者: 材料科學與工程研究所
    关键词: MAGNESIUM ALLOY;CORROSION BEHAVIOR;MOLTEN-SALT;ELECTRODEPOSITION;CHLORIDE;ZINC;ALUMINUM;METALS;AIR;TIN
    日期: 2011
    上传时间: 2012-03-27 16:28:54 (UTC+8)
    出版者: 國立中央大學
    摘要: Electrochemical reaction of Zn(II)/Zn on glassy carbon electrode(GC) and Mg alloy substrates was investigated in the room-temperature ionic liquid, N-butyl-N-methyl-pyrrolidinium dicyanamide (BMP-DCA) containing ZnCl(2) at 323 K. Amperometric titration experiments suggest that Zn(II) reacted with DCA anions forming [Zn(DCA)(3)](-) complex anion, which also could be reduced to Zn metal via a single-step electron transfer process. By chronoamperometric measurements, the electrodeposition of Zn on GC and Mg alloy substrates involved three-dimensional instantaneous nucleation under diffusion control at 323 K. The Zn deposits are also systematically characterized by the techniques of powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The Zn layer deposited at a lower current density on Mg alloy substrates was more compact and uniform when compared to that deposited at a higher current density: consequently, this coating revealed a protection capability for the Mg substrate against corrosion. (C) 2011 Elsevier Ltd. All rights reserved.
    關聯: ELECTROCHIMICA ACTA
    显示于类别:[材料科學與工程研究所 ] 期刊論文

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