Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles

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	Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles
	A. N. Chen; F. H. Cao; W. J. Liu; L. Y. Zheng; Z. Zhang; J. Q. Zhang; C. N. Cao
	2012
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	22 期号:1 页码:228-240
摘要	The corrosion behaviors of zinc alloy (ZnAl4Cu1) in 3.5% (mass fraction) NaCl, 7.3% (mass fraction) Na2SO4 and simulated acid rain solutions were investigated using electrochemical measurements. The potential noise during dry-wet cycle was monitored and analyzed by fast Fourier transform (FFT), fast wavelet transform (FWT), shot noise theory and stochastic theory. Cumulative probability curves of event frequency f(n) indicate that the corrosion events in the dry cycles are greater than those in the wet cycles. Uniform corrosion was observed in the NaCl solution compared with more localized corrosion in the Na2SO4 solution, which is evidenced by FWT and SEM. Conditional events generation rate r(t) for diffusion controlled reactions decreases with increasing the time. r(t) values for uniform corrosion and diffusion controlled process are the largest in the wet cycle in 3.5% NaCl solution. The values of r(t) for pitting corrosion in Na2SO4 solution are observed to become large during spraying periods, and r(t) for pitting corrosion has the largest value in the Na2SO4 solution. The intergranular corrosion of zinc is serious in simulated acid rain solution.
部门归属	[chen an-na; cao fa-he; liu wen-juan; zheng li-yun; zhang zhao; zhang jian-qing; cao chu-nan] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang jian-qing; cao chu-nan] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;cao, fh (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china.;nelson_cao@zju.edu.cn
关键词	Electrochemical Noise Shot Noise Analysis Dry-wet Cycle Zinc Alloy Simulated Acid-rain Electrochemical Noise Atmospheric Corrosion Pure Aluminum Exco Solution Susceptibility (Nh4)(2)So4 Parameters Nacl So2
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/59895
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	A. N. Chen,F. H. Cao,W. J. Liu,et al. Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles[J]. Transactions of Nonferrous Metals Society of China,2012,22(1):228-240.
APA	A. N. Chen.,F. H. Cao.,W. J. Liu.,L. Y. Zheng.,Z. Zhang.,...&C. N. Cao.(2012).Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles.Transactions of Nonferrous Metals Society of China,22(1),228-240.
MLA	A. N. Chen,et al."Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles".Transactions of Nonferrous Metals Society of China 22.1(2012):228-240.