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| Effects of Urea on Corrosion Behavior of Q235 Steel in Soil |
LI Ximing1, JIN Zhe2, LIU Wuzhu3, SUN Cheng1, ZHANG Hongwei2, XU Jin1,
YAN Maocheng1, YU Changkun1, WANG Zhenyao1 |
1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. Shenyang Technology Branch Office, PetroChina, Shengyang 110031, China;
3. Mobile Equipment Office, Liaoyang Petrochemical Company, PetroChina, Liaoyang 111003, China |
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Abstract The effect of urea (0.1%, mass fraction) on corrosion of Q235 steel in soil with humidity of 30% was investigated by electrochemical impendence spectroscopy (EIS) and polarization curve. At the initial experiment period, urea was adsorbed on the surface of carbon steel, and one time constant with an inductive reactance arc appeared in the EIS. Along with the time, urea was decomposed into ammonia, hence pH decreased. The potential of carbon steel increased and its corrosion rate decreased over experiment time. Warburg impedance was found at the later stage, which indicated that the process was controlled by concentration polarization.
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Cite this article:
LI Ximing,JIN Zhe,LIU Wuzhu,SUN Cheng,ZHANG Hongwei,XU Jin,
YAN Maocheng,YU Changkun,WANG Zhenyao. Effects of Urea on Corrosion Behavior of Q235 Steel in Soil. Journal of Chinese Society for Corrosion and protection, 2013, 33(3): 216-220.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2013/V33/I3/216
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[1] Chaker V, Palmer J D. Effects of Soil Characteristics on Corrosion [M]. Ann Arbor: Am. Soc. Testing Meter., 1916: 95-106
[2] Benmoussa A, Hadjel M, Traisnel M. Corrosion behavior of api 5l x-60 pipeline steel exposed to near-neutral ph soil simulating solution [J]. Mater. Corros., 2006, 57(10): 771-777
[3] Ismail A I M, El-Shamy A M. Engineering behaviour of soil materials on the corrosion of mild steel [J]. Appl. Clay Sci., 2009, 42(3-4): 356-362
[4] Liu T M, Wu Y H, Luo S X, et al. Effect of soil compositions on the electrochemical corrosion behavior of carbon steel in simulated soil solution [J]. Mat.-wiss. u. Werkstofftech., 2010, 41(4): 228-233
[5] Ferreira C A M, Ponciano J A C, Vaitsman D S, et al. Evaluation of the corrosivity of the soil through its chemical composition [J]. Sci. Total Environ., 2007, 388(1-3): 250-255
[6] Collins H H, Padley T J. Protection of spun ductile iron pipes against corrosion by soils [A]. 5th International Conference on the Internal External Protection of Pipes [C]. Insbruck: 1983
[7] Mozheiko F F, Potkina T N, Goncharik I I. Effect of inhibitors on corrosion resistance of carbon steel in suspensed liquid combined fertilizer [J]. Rus. J. Appl. Chem., 2008, 81(9): 1705-1709
[8] Li Y, Zhang T, Wang F H. Corrosion behavior of AZ91D magnesium alloy in hand sweat. II Inhibiting mechanism of urea on magnesium alloy AZ91D in hand sweat [J]. J. Chin. Soc. Corros. Prot., 2004, 24(6): 334-339
(李瑛, 张涛, 王福会. AZ91D镁合金手汗腐蚀机理研究. II 手汗液中尿素对AZ91D腐蚀的缓蚀机制 [J]. 中国腐蚀与防护学报, 2004, 24(6): 334-339)
[9] Zhang J Q, Cao C N. Introduction of Electrochmical Impedance Spectroscopy [M]. Beijing: Science Press, 2002
(张鉴清, 曹楚南. 电化学阻抗谱导论 [M]. 北京: 科学出版社, 2002)
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