Electrochemistry of Zn(II)/Zn on Mg alloy from the N-butyl-N-methylpyrrolidinium dicyanamide ionic liquid

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題名:	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
貢獻者:	材料科學與工程研究所
關鍵詞:	MAGNESIUM ALLOY;CORROSION BEHAVIOR;MOLTEN-SALT;ELECTRODEPOSITION;CHLORIDE;ZINC;ALUMINUM;METALS;AIR;TIN
日期:	2011
上傳時間:	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
顯示於類別:	[材料科學與工程研究所 ] 期刊論文

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