Measurement and Wavelet Analysis of the Electrochemical Noise of Rebar Steel in Simulated Concrete Pore Solution

Authors

Rong-gang HU, College of Chemistry and Chemical Engineering,State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University,Xiamen 361005,Fujian,China;
Chen-qing YE, College of Chemistry and Chemical Engineering,State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University,Xiamen 361005,Fujian,China;
Shi-gang DONG, College of Chemistry and Chemical Engineering,State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University,Xiamen 361005,Fujian,China;
Chang-jian LIN, College of Chemistry and Chemical Engineering,State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University,Xiamen 361005,Fujian,China;

Abstract

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.

Keywords

electrochemical noise, wavelet analysis, rebar stee

DOI Link

https://doi.org/10.61558/2993-074X.3335

Publication Date

2010-05-28

Online Available Date

2010-05-28

Revised Date

2010-05-28

Received Date

2010-05-28

Recommended Citation

Rong-gang HU, Chen-qing YE, Shi-gang DONG, Chang-jian LIN. Measurement and Wavelet Analysis of the Electrochemical Noise of Rebar Steel in Simulated Concrete Pore Solution[J]. Journal of Electrochemistry, 2010 , 16(2): Article 7.
DOI: 10.61558/2993-074X.3335
Available at: https://jelectrochem.xmu.edu.cn/journal/vol16/iss2/7