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Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating
J. Xu; C. Sun; M. C. Yan; F. H. Wang
2013
Source PublicationIndustrial & Engineering Chemistry Research
ISSN0888-5885
Volume52Issue:36Pages:12838-12845
AbstractDistributions of potential and current and variations of crevice environments are studied in a crevice under a simulated disbonded coating in soil extract solutions (SES) with and without sulfate-reducing bacteria (SRB). Results show that forming of the crevice blocks the penetration of cathodic currents in the crevice and weakens the cathodic polarization of the steel Q 235. The cathodic currents in the presence of SRB are nearly three times more than those without SRB at the same cathodic protective potential, which indicates that SRB increases the energy consumption of the cathodic protection systems. SRB leads to basification of the solution in the crevice. The forming of inner electric field enhances the anionic migration into the crevice. The forming of the reversed potential increases the cathodic current.
description.department[xu, jin ; sun, cheng ; yan, maocheng ; wang, fuhui] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, liaoning, peoples r china. ; xu, j (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, liaoning, peoples r china. ; xujin@imr.ac.cn
KeywordSulfate-reducing Bacteria Cathodic Protection Carbon-steel Pipeline Coatings Corrosion Crevice Biofilm Polarization Environment Underneath
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72434
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Xu,C. Sun,M. C. Yan,et al. Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating[J]. Industrial & Engineering Chemistry Research,2013,52(36):12838-12845.
APA J. Xu,C. Sun,M. C. Yan,&F. H. Wang.(2013).Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating.Industrial & Engineering Chemistry Research,52(36),12838-12845.
MLA J. Xu,et al."Variations of Microenvironments with and without SRB for Steel Q 235 under a Simulated Disbonded Coating".Industrial & Engineering Chemistry Research 52.36(2013):12838-12845.
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