| Autor: |
Mehdi Attarchi, Mahyar Mazloumi, Abdolhamid Jafari, M. Asadi, Sayed Khatiboleslam Sadrnezhaad |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Anti-Corrosion Methods and Materials. 56:103-109 |
| ISSN: |
0003-5599 |
| Popis: |
Purpose – The purpose of this paper is to evaluate advanced mathematical electrochemical noise analysis (ENA) as a way of corrosion monitoring for carbon steel.Design/methodology/approach – The electrochemical potential/current noise was recorded simultaneously with a working‐reference‐working electrode set up and the processing of data was performed through fast Fourier transformation (FFT) and wavelet transformation (WT) routes. The formation and rupture of carbonate films on St37 steel electrodes in a 0.5 M sodium bicarbonate electrolyte was studied for 20 h utilizing an electrochemical noise approach.Findings – Although the slope of mid‐range of noise impedance exhibited a mechanistic style, and increased with film formation and decreased with film rupture, FFT of potential noise was more sensitive to film formation and rupture. WT of potential noise depicted that ν=1.41 × 10−2 Hz was the boundary frequency in the film formation. At frequencies higher than the mentioned limit, the fraction of distribu... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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