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| TREND REMOVAL IN THE ANALYSIS OF ELECTROCHEMICAL NOISE BY POLYNOMIAL FITTING WITH WINDOW TECHNIQUE |
| HUANG Jiayi;QIU Yubing;GUO Xingpeng |
| Key Laboratory of Materials Chemistry and Service Failure;Department of Chemistry and Chemical Engineering;Huazhong University of Science and Technology;Wuhan 430074 |
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Abstract Removing DC drift from the original electrochemical noise (EN) signal was required for recovering the EN data before calculating standard deviations and power spectral densities. In this article, a real-time method, which brings up polynomial fitting using window technique, has been applied to remove the trend of the experimental data for Q235 carbon steels in 0.5 mol/L NaCl solution, and the validity of trend removal was discussed with the energy distribution plots (EDPs). The results showed that the order and window size can corporately influence the removing results and the characteristic of the EDPs. In order to attenuate the low-frequency components without damage the useful information, the lower polynomial order (no bigger than 3)and appropriate size (between 1024 and 4096), which was determined by characteristics of EN fluctuations, should be selected.
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Received: 20 April 2007
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Corresponding Authors:
Jiayi QIU
E-mail: Qiuyubin@mail.hust.edu.cn
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| [1] Bertocci U，Huet F. Noise analysis applied to electrochemical systems[J]. Corrosion，1995，51：131-144
[2] Bertocci U，Huet F. Drift removal procedures in the analysis of electrochemical noise[J]. Corrosion，2002，58(4)：337-347
[3] Qiu Y B，Huang J Y，Guo X P. Trend removal in the analysis of electrochemical noise by polynomial fitting[J]. J. Huazhong Univ. Sci. Technol. (Nat. Sci. Edi.)，2005，33(10)：39-42
(邱于兵，黄家怿，郭兴蓬. 多项式拟合法消除电化学噪声的直流漂移[J]. 华中科技大学学报（自然科学版），2005，33(10)：39-42)
[4] Aballe A，Bethencourt M，Botana F J，et al. Wavelet transform-based analysis for electrochemical noise[J]. Electrochem. Commun.，1999，1：266-270
[5] Aballe A，Bethencourt M，Botana F J，et al. Using wavelets transform in the analysis of electrochemical noisedata[J]. Electrochim. Acta，1999，44：4805-4816
[6] Bruce A，Gao H Y. Applied Wavelet Analysis with S-Plu-s[M]. New York：Springer，1996
[7] Zhao B，Li J H，Hu R G，et al. Study on the corrosion behavior of reinforcing steel in cement mortar by electrochemical noise measurements[J]. Electrochim. Acta，2006，in press
[8] Mansfeld F，Sun Z，Hsu C H，et al. Concerning trend removal in electrochemical noise measurements[J]. Corros. Sci.，2001，43：341-352
[9] Tan Y J，Bailey S，Kinsella B. The monitoring of the formation and destruction of corrosion inhibitor films using electrochemical noise analysis[J]. Corros. Sci.，1996，38(10)：1681-1695 |
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