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| Initial Corrosion Behavior of Carbon Steel Q235 in Petrochemical Atmospheric Environment |
| Received:January 06, 2011 Revised:June 15, 2011 |
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| DOI： |
| KeyWord:rusts analysis initial corrosion petrochemical atmospheric corrosion electrochemical impedance spectrum |
| Author | Institution |
| HU Zhang-zhi |
Wuhan Research Institute of Material Protection，Wuhan ，China |
| ZHOU Xue-jie |
Wuhan Research Institute of Material Protection，Wuhan ，China |
| WU Jun |
Wuhan Research Institute of Material Protection，Wuhan ，China |
| TIAN Feng |
Wuhan Research Institute of Material Protection，Wuhan ，China |
| PAN Ying |
Wuhan Research Institute of Material Protection，Wuhan ，China |
| ZHANG San-ping |
Wuhan Research Institute of Material Protection，Wuhan ，China |
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| Abstract: |
| Exposure test of carbon steel Q235 was carried in chemical industry atmospheric environment of Wuhan petrochemical factory district for half a year. The initial period corrosion rate of the steel was surveyed; the sample rust level characteristic after exposure was analyzed using scanning electron microscope and XRD observation; the electrochemical impedance spectrum of the rust test specimen was measured. Result showed that the main corrosion products of carbon steel Q235 after exposure for half a year is mainly Fe（ 2 SO4） 3·nH2O, FeSO4·nH2O, FeOOH, and Fe（OH）（SO4）（H2O） ; the rust layer formed in the initial period has certain hindrance function to the corrosion development. |
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