|
|
|
| Electrochemical Noise Analysis of Local Pitting Corrosion Behavior of Pure Aluminum |
| LIU Shiqiang, WANG Lida, ZONG Qiufeng, ZHANG Cheng, LIU Guichang |
| School of Chemical Engineering, Dalian University of Technology, Dalian 116023, China |
|
|
|
|
Abstract The local pitting corrosion behavior of the pure aluminum in 3.5%NaCl solution was characterized by electrochemical noise analysis technique. The corrosion processes for aluminum were studied in detail by analyzing time-domain and frequency-domain characteristics of electrochemical noise together with morphology features. The results show that the time-domain spectroscopy of the electrochemical noise can be used to predict the occurrence of local corrosion and qualitatively distinguish the type of corrosion. It was found that the current standard deviation σI, noise resistance Rn and current white noise levels W can reflect the corrosion intensity. When the corrosion occurs, σI and W tend to increase, but Rn tends to decrease.
|
|
Received: 27 April 2013
|
|
|
[1] Hladky K, Dawson J L. The measurement of localized corrosion using electrochemical noise [J]. Corros. Sci., 1981, 21: 317-322
[2] Helmuth S K, Joachim G, Andreas H. The influence of the cathodic process on the interpretation of electrochemical noise signals arising from pitting corrosion of stainless steels [J]. Corros. Sci., 2010, 52: 1362-1372
[3] Bertocci U, Huet F. Noise analysis applied to electrochemical systems [J]. Corrosion, 1995, 51(2): 131-144
[4] Gabrielli C, Keddam M. Review of applications of impedance and noise analysis to uniform and localized corrosion [J]. Corrosion, 1992, 48(10): 794-811
[5] Leoal A, Doleoek V. Corrosion monitoring system based on measurement and analysis of electrochemical noise [J]. Corrosion, 1995, 51(4): 295-300
[6] Zhang Z, Zhang J Q, Wang J M, et al. Features of electrochemical noise during pitting corrosion of 2024-T3 aluminum alloy in 3.0% Na2SO4 solution [J]. Chin. J. Nonferrous Met., 2001, 11(2): 284-287
(张昭, 张鉴清, 王建明等. 硫酸钠溶液中2024-T3铝合金孔蚀的电化学噪声特征 [J]. 中国有色金属学报, 2001, 11(2): 284-287)
[7] Cheng Y F, Wilmott M, Luo J L. Analysis of the electrodecapacitance on the initiation of pits for A516 carbon steel by electrochemical noise measurements [J]. Corros. Sci., 1999, 41(6): 1245-1256
[8] Kiwilszo M, Smulko J. Pitting corrosion characterization by electrochemical noise measurements on asymmetric electrodes [J]. J. Solid State Chem., 2009, 13: 1681-1686
[9] Garc?'a-Ochoa E, Gonza'lez-Sa'nchez J. Application of electrochemical noise to evaluate outdoor atmospheric corrosion of copper after relatively short exposure periods [J]. Appl. Electrochem., 2008, 38: 1363-1368
[10] Xia D H, Song S Z, Wang J H, et al. Determination of corrosion types from electrochemical noise by phase space reconstruction theory [J]. Electrochem. Commun., 2012, 15: 88-92
[11] Zhang J Q, Zhang Z, Wang J M, et al. Analysis and application of electrochemical noise I. Theory of electrochemical noise analysis [J]. J. Chin. Soc. Corros. Prot., 2001, 21(5): 310-320
(张鉴清, 张昭, 王建明等. 电化学噪声的分析与应用-I. 电化学噪声的分析原理 [J]. 中国腐蚀与防护学报, 2001, 21(5): 310-320)
[12] Zhang J Q. Electrochemical Measurement Technology [M]. Beijing: Chemical Industry Press, 2010: 318-319
(张鉴清. 电化学测试技术 [M]. 北京: 化学工业出版社, 2010: 318-319) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
