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| EFFECT OF UREA ON MICROBIAL CORROSION BEHAVIOR OF Q235 STEEL IN SOIL |
| LI Ximing1, ZHANG Chunyan2, ZHU Hui3, SUN Cheng1, XU Jin1, XIAN Jun3, WANG Wenbin3, YU Changkun1 |
1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2. Kalamayi Zhixin Co. Ltd, Kalamayi 834002
3. Oil-gas Storage and Transportation Company of Xinjiang Oilfield, Kalamayi 834002 |
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Abstract The effect of urea (0.05 mass %) on the microbial corrosion of Q235 steel in soil with humidity at 10 % was investigated by electrochemical impendence spectroscopy(EIS), polarization curve, scanning electron microscopy (SEM) and EDX. The results showed that urea accelerated carbon steel corrosion in soil with SRB yet prevented the corrosion of steel in sterile soil. The results of EIS showed that in inoculated soil only one time constant appeared in primary experimental period, two time constants appeared after 5 d and corrosion product formed on the steel surface. Warburg impedance was found at the later stage, which indicated that the process was controlled by concentration polarization. Sulfur element was detected in corrosion product of carbon steel in soil with SRB by EDX, which confirmed the effects of SRB on the corrosion.
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Received: 26 September 2011
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| Fund: National Natural Science Foundation of China;National Natural Science Foundation of China;National RD Infrastructure and Facility Development Program of China |
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Corresponding Authors:
SUN Cheng
E-mail: chengsun@imr.ac.cn
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Cite this article:
LI Ximing, ZHANG Chunyan, ZHU Hui, SUN Cheng, XU Jin, XIAN Jun, WANG Wenbin, YU Changkun. EFFECT OF UREA ON MICROBIAL CORROSION BEHAVIOR OF Q235 STEEL IN SOIL. Journal of Chinese Society for Corrosion and protection, 2012, 32(5): 397-402.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2012/V32/I5/397
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