Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition

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	Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition; Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition
	Y. Y. Shi; Z. Zhang; J. X. Su; F. H. Cao; J. Q. Zhang
	2006 ; 2006
发表期刊	Electrochimica Acta ; Electrochimica Acta
ISSN	0013-4686 ; 0013-4686
卷号	51 期号:23 页码:4977-4986
摘要	Potential noise records have been collected for 2024-T3 aluminum alloy, which was exposed to simulated acid rain with different pH value for 15 wet-dry cycles. Meanwhile, Potentiodynamic polarization and SEM techniques were also used as assistant measurements. Three mathematic methods including average, standard deviation and wavelet transformation have been employed to analyze the records. The results showed that each single wet-dry cycle can be divided into three regions with respect to the change of the cathodic reaction rate, and with the increase of pH value the main cathodic reaction changes from the reduction of protons to that of oxygen molecules. The analysis of the EDP versus time evolution clearly indicates that the whole corrosion process can be divided into three segments for the case of pH 3.5 and only one for the cases of pH 4.5 and 6.0, which have been theoretically interpreted according to the corrosion theory and experimentally proved by SEM. The results also showed that the corrosion in the case of pH 3.5 was much more rigorous than that in the cases of pH 4.5 and 6.0. It may due to synergistic effects of that, the characteristic of hydrogen ions which is much more active than that of oxygen molecules, the high diffusion/migration rate of hydrogen ions in solution or through surface films and the lower stability of surface passive film at low pH value system. (c) 2006 Elsevier Ltd. All rights reserved.; Potential noise records have been collected for 2024-T3 aluminum alloy, which was exposed to simulated acid rain with different pH value for 15 wet-dry cycles. Meanwhile, Potentiodynamic polarization and SEM techniques were also used as assistant measurements. Three mathematic methods including average, standard deviation and wavelet transformation have been employed to analyze the records. The results showed that each single wet-dry cycle can be divided into three regions with respect to the change of the cathodic reaction rate, and with the increase of pH value the main cathodic reaction changes from the reduction of protons to that of oxygen molecules. The analysis of the EDP versus time evolution clearly indicates that the whole corrosion process can be divided into three segments for the case of pH 3.5 and only one for the cases of pH 4.5 and 6.0, which have been theoretically interpreted according to the corrosion theory and experimentally proved by SEM. The results also showed that the corrosion in the case of pH 3.5 was much more rigorous than that in the cases of pH 4.5 and 6.0. It may due to synergistic effects of that, the characteristic of hydrogen ions which is much more active than that of oxygen molecules, the high diffusion/migration rate of hydrogen ions in solution or through surface films and the lower stability of surface passive film at low pH value system. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, inst met res, state key lab corros & protect met, shenyang 110016, peoples r china.;zhang, z (reprint author), zhejiang univ, dept chem, yu quan campus, hangzhou 310027, peoples r china;eaglezzy@zjuem.zju.edu.cn ; zhejiang univ, dept chem, hangzhou 310027, peoples r china. chinese acad sci, inst met res, state key lab corros & protect met, shenyang 110016, peoples r china.;zhang, z (reprint author), zhejiang univ, dept chem, yu quan campus, hangzhou 310027, peoples r china;eaglezzy@zjuem.zju.edu.cn
关键词	2024-t3 Aluminum Alloy 2024-t3 Aluminum Alloy Atmospheric Corrosion Atmospheric Corrosion Wet-dry Cycle Wet-dry Cycle Simulated Simulated Acid Rain Acid Rain Electrochemical Noise (En) Electrochemical Noise (En) Pitting Corrosion Pitting Corrosion Electrolyte Layer Electrolyte Layer Wavelets Wavelets Behavior Behavior Transform Transform Impedance Impedance Steel Steel Iron Iron
URL	查看原文 ; 查看原文
WOS记录号	WOS:000238558600026 ; WOS:000238558600026
引用统计	被引频次：89[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/321006/34457
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Y. Shi,Z. Zhang,J. X. Su,et al. Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition, Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition[J]. Electrochimica Acta, Electrochimica Acta,2006, 2006,51, 51(23):4977-4986, 4977-4986.
APA	Y. Y. Shi,Z. Zhang,J. X. Su,F. H. Cao,&J. Q. Zhang.(2006).Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition.Electrochimica Acta,51(23),4977-4986.
MLA	Y. Y. Shi,et al."Electrochemical noise study on 2024-T3 Aluminum alloy corrosion in simulated acid rain under cyclic wet-dry condition".Electrochimica Acta 51.23(2006):4977-4986.