In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique

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	In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique
	Z. N. Yang; Z. Zhang; W. H. Leng; K. Ling; J. Q. Zhang
	2006
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	16 期号:1 页码:209-216
摘要	The nickel electroplating process was investigated by means of electrochemical noise(EN), cyclic voltammetry in conjunction with the scanning electron microscopy(SEM) technique. The results show that, in the experimental conditions and with the increase of current density, the growth mechanism of nickel crystallites changes from 2-D to 3-D with the potential turning point of about -1.15 V, and the potential for the onset of diffusion control of the ensemble nickel electroplating process was about -1.4 V. In the case of activation-control, the two-dimensional (2-D) nucleation/growth process of nickel often results in the electrocrystallization EN features of only slowly small positive potential drift and the corresponding compact layer-by-layer deposit structure, and the maximum relative energy of the RP-EDP (re-plotted relative energy distribution plot), which is obtained from wavelet analysis, defined in the region with smaller scales. While under the diffusion-control, the three-dimensional (3-D) nucleation/growth process of nickel, often results in the electrocrystallization EN features of both the fast positive potential drift and subsequent remarkable negative potential drift and the corresponding dentritic/large conglomerate structure of nickel deposit, and the maximum relative energy of the RP-EDP defined in the region with larger scales. The electroplating time affects the nickel deposit structure mainly through its influence on the growth rate of crystallites and the Ni2+ ions diffusion process around each crystallite.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. state key lab corros & protect, shenyang 110015, peoples r china.;zhang, z (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;eaglezzy@zjuem.zju.edu.cn
关键词	Nickel Electroplating Electrochemical Noise Electrodeposit Structure Nucleation Growth Silver Crystallization Transform Wavelets Aluminum Behavior Metals
URL	查看原文
WOS记录号	WOS:000235911400037
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34652
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. N. Yang,Z. Zhang,W. H. Leng,et al. In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique[J]. Transactions of Nonferrous Metals Society of China,2006,16(1):209-216.
APA	Z. N. Yang,Z. Zhang,W. H. Leng,K. Ling,&J. Q. Zhang.(2006).In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique.Transactions of Nonferrous Metals Society of China,16(1),209-216.
MLA	Z. N. Yang,et al."In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique".Transactions of Nonferrous Metals Society of China 16.1(2006):209-216.