Electrochemical noise ( ECN) measurement can provide information about both corrosion rate and corrosion type while inflicting no perturbation on the studied system. The ECN data of steel rebar in SPS with different amount of Cl-were collected and treated by discrete wavelet transformation to evaluate the contribution from transients in different frequency in the overall signals. Energy distribution plot( EDP) indicated in SPS with 0. 0001 mol/L NaCl,the transients with time constant between 16 ~ 32 s were found to be predominant over other processes; while in SPS with higher Cl-concentration,the trend toward active corrosion became the main process. It is concluded that the threshold Cl-concentration determining corrosion/passivation of steel rebar in SPS is between 10-4 ~ 10-3 mol/L.


electrochemical noise, wavelet analysis, rebar stee

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[1]Blanc G,Gabrielli C,Ksourti M,et al.Experimental study of the relationships between the electrochemical noise and the structures of the electrodepositions of metals[J].Electrochimica Acta,1978,23(4):337-340.
[2]Iverson W P.Transient voltage changes produced in cor-roding metals and alloys[J].Journal of the Electro-chemical Society,1968,115:617.
[3]Aballe A,Bethencourt M,Botana F J,et al.Wavelet transform-based analysis for electrochemical noise[J].Electrochemistry Communications,1999,1(7):266-270.
[4]Mansfield F,Little B A.Technique review of electro-chemical technique applied to microbiologically influ-enced corrosion[J].Corrosion Science,1991,32:247-272.
[5]Xiao H,Han L T,Lee C C,et al.Collection of electro-chemical impedance and noise data for polymer-coated steel from remote test sites[J].Corrosion,1997,53(5):412-422.
[6]Gusmano G,Montesperelli G,Pacetti S,et al.Electro-chemical noise resistance as a tool for corrosion rate prediction[J].Corrosion,1997,53(11):860-868.
[7]Wharton J A,Wood R J K,Mellor B G.Wavelet analysis of electrochemical noise measurements during corrosion of austenitic and superduplex stainless steels in chloride media[J].Corrosion Science,2003,45:97-122.
[8]Zhou X Y,Lvov S N,Wei X J,et al.Quantitative evalua-tion of general corrosion of type304stainless steel in subcritical and supercritical aqueous solutions via elec-trochemical noise analysis[J].Corrosion Science,2002,44:841-860.
[9]Cheng Y F,Wilmott M,Luo J L.Analysis of the role of electrode capacitance on the initiation of pits for A516 carbon steel by electrochemical noise measurements[J].Corrosion Science,1999,41(7):1245-1256.
[10]Uruchurtu J,Dawson J L.Noise analysis of pure alumi-num under different pitting corrosions[J].Corrosion,1987,43(1):19-25.
[11]Uruchurtu J.Electrochemical investigations of the acti-vation mechanism of aluminum[J].Corrosion,1991,47(6):472-479.
[12]Greisiger H,Schauer T.On the interpretation of the el-ectrochemical noise data for coatings[J].Progress in Organic Coatings,2000,39(1):31-36.
[13]Mansfeld F,Han L T,Lee C C,et al.Evaluation of cor-rosion protection by polymer coatings using electro-chemical impedance spectroscopy and noise analysis[J].Electrochimica Acta,1998,43,2933-2945.
[14]Mills D J,Mabbutt S.Investigation of defects in organic anti-corrosive coatings using electrochemical noise measurement[J].Progress in Organic Coatings,2000,39(1):41-48.
[15]Schauer T,Greisiger H,Dulog L.Details on MEM anal-ysis of electrochemical noise data and correlation with impedance measurements for organic coatings on metals[J].Electrochimica Acta,1998,43(16/17):2423-2433.
[16]Gao Z M(高志明),Song X P(宋小平),Pang X S(庞兴收),et al.The application of wavelet in transient measurement of corrosion electrochemistry[J].Journal of Chinese Society for Corrosion and Protection(中国腐蚀与防护学报),2001,21(4):245-249.
[17]Dong Z H(董泽华),Guo X P(郭兴蓬),Zheng J S(郑家燊).Review on electrochemical noise analysis methods[J].Materials Protection(材料保护),2001,14(7):20-24.
[18]Searson P C,Dawson J L.Analysis of electrochemical noise generated by corroding electrodes under open-cir-cuit conditions[J].Journal of the Electrochemical So-ciety,1988,135(8):1908-1915.
[19]Aballe A,Bethencourt M,Botana F J,et al.Using wa-velets transform in the analysis of electrochemical noise data[J].Electrochimica Acta,1999,44:4805-4816.
[20]Nachstedt K,Heusler K E.Electrochemical noise at pa-ssive iron[J].Electrochimica Acta1988,33(3):311-321.
[21]Mc Cafferty E J.A competitive model for the inhibition of crevice corrosion and pitting[J].Journal of the Electrochemical Society,1990137(12):3731-3737.



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