|
| Corrosion Behavior of Q235 in Simulated Natural Environment by Electrochemical Technology |
| Received:February 10, 2011 Revised:August 15, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:thin electrolyte layer EIS atmospheric corrosion cathodic polarization curve rust layer |
| Author | Institution |
| ZHENG Li-yun |
Zhejiang University， Hangzhou ， China |
| CAO Fa-he |
Zhejiang University， Hangzhou ， China |
| LIU Wen-juan |
Zhejiang University， Hangzhou ， China |
| CHEN An-na |
Zhejiang University， Hangzhou ， China |
| LIAO Xiao-ning |
Zhejiang University， Hangzhou ， China |
| ZHANG Jian-qing |
1. Zhejiang University， Hangzhou ， China;2. Institute of Metal Research of the Chinese Academy of Sciences， Shenyang ， China |
|
| Hits: |
| Download times: |
| Abstract: |
| The atmospheric corrosion process of Q235 steel under thin electrolyte layer (TEL) was investigated by electrochemical impedance spectroscopy (EIS) and cathodic polarization. The influence of the thickness of TEL, chloride ions, and corrosion production on the degradation process of Q235 steel was discussed. The results indicated that the thickness of TEL affect the diffusion process of O2, which further influence the corrosion rate. The effect of TEL to the two-layer rust under Cl- containing environment was analyzed. The rust layer is composed of outer layer which is porous and loose and an inner layer containing α-FeOOH and γ-FeOOH. However the rust layer was only one layer in bulk solution which was rather porous. The corrosion rate of Q235 steel under TEL is higher than that in bulk solution, which is controlled by cathodic process and corrosion product. The corrosion rate is maximum under 202 μm TEL, while localized pit is deepest. |
| Close |