Corrosion Behaviors of Q235 Steel in Indoor Soil

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	Corrosion Behaviors of Q235 Steel in Indoor Soil
	Y. Wan; L. Ding; X. M. Wang; Y. B. Li; H. Sun; Q. Wang
	2013
发表期刊	International Journal of Electrochemical Science
ISSN	1452-3981
卷号	8 期号:12 页码:12531-12542
摘要	The corrosion behaviors of Q235 steel coupons were investigated via immersion and in-situ volumetric curve in soils with various moistures. The volumetric curves showed that the corrosion process of steel in the soils was a combination of activation and diffusion control. The cathodic part of the polarization curve obeyed Tafel law. Its extrapolation to the corrosion potentials gave the instantaneous corrosion rates much bigger than the average corrosion rate from mass loss. Nevertheless, both of the average and the instantaneous corrosion rates not only showed moisture had significant effect on soil corrosion of Q235 steel but the biggest was in 26% moisture soil being ca. 1.5x of the corrosion rate in the 12% moisture soil. The average corrosion rates for 7 days exposure were bigger than 21 days, owing to more corrosion products accumulating on the surface and hindering mass transfer at longer exposure than at initial immersion. Maximum pit depth grew fast and pit-covered length in per millimeter on the surface of the coupons (L-pit) slow during the first two exposure durations, and they were reversed during the third exposure duration.
部门归属	[wan, ye ; ding, lei ; wang, xiumei ; li, yanbo ; wang, qing] shenyang jianzhu univ, sch mat sci & engn, shenyang 110168, peoples r china. [wan, ye ; sun, hong] shenyang jianzhu univ, sch traff & mech engn, shenyang 110168, peoples r china. [wan, ye] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; wan, y (reprint author), shenyang jianzhu univ, sch mat sci & engn, shenyang 110168, peoples r china. ; ywan@sjzu.edu.cn
关键词	Q235 Steel Soil Moisture Content Corrosion Depth Polarization Carbon-steel Cathodic Protection Pipe Corrosiveness Environment Pipelines Rates
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71509
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wan,L. Ding,X. M. Wang,et al. Corrosion Behaviors of Q235 Steel in Indoor Soil[J]. International Journal of Electrochemical Science,2013,8(12):12531-12542.
APA	Y. Wan,L. Ding,X. M. Wang,Y. B. Li,H. Sun,&Q. Wang.(2013).Corrosion Behaviors of Q235 Steel in Indoor Soil.International Journal of Electrochemical Science,8(12),12531-12542.
MLA	Y. Wan,et al."Corrosion Behaviors of Q235 Steel in Indoor Soil".International Journal of Electrochemical Science 8.12(2013):12531-12542.