Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm

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	Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm
	P. Y.; Xu Zhang, D. K.; Li, Y. C.; Yang, K.; Gu, T. Y.
	2015
发表期刊	Bioelectrochemistry
ISSN	1567-5394
卷号	101 页码:14-21
摘要	In the microbiologically influenced corrosion (MIC) caused by sulfate reducing bacteria (SRB), iron oxidation happens outside sessile cells while the utilization of the electrons released by the oxidation process for sulfate reduction occurs in the SRB cytoplasm. Thus, cross-cell wall electron transfer is needed. It can only be achieved by electrogenic biofilms. This work hypothesized that the electron transfer is a bottleneck in MIC by SRB. To prove this, MIC tests were carried out using 304 stainless steel coupons covered with the Desulfovibrio vulgaris (ATCC 7757) biofilm in the ATCC 1249 medium. It was found that both riboflavin and flavin adenine dinudeotide (FAD), two common electron mediators that enhance electron transfer, accelerated pitting corrosion and weight loss on the coupons when 10 ppm (w/w) of either of them was added to the culture medium in 7-day anaerobic lab tests. This finding has important implications in MIC forensics and biofilm synergy in MIC that causes billions of dollars of damages to the US industry each year. (C) 2014 Elsevier B.V. All rights reserved.
部门归属	[zhang, peiyu ; li, yingchao ; gu, tingyue] ohio univ, dept chem & biomol engn, inst corros & multiphase technol, athens, oh 45701 usa. [xu, dake ; yang, ke] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; xu, dk (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; xudake@imr.ac.cn ; gu@ohio.edu
关键词	Biofilm Biocorrosion Srb Electron Transfer Electron Mediator Sulfate-reducing Bacteria Microbial Fuel-cells C-type Cytochromes Carbon-steel Flavins Iron Electricity Mechanisms Reduction
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74022
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Y.,Xu Zhang, D. K.,Li, Y. C.,et al. Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm[J]. Bioelectrochemistry,2015,101:14-21.
APA	P. Y.,Xu Zhang, D. K.,Li, Y. C.,Yang, K.,&Gu, T. Y..(2015).Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm.Bioelectrochemistry,101,14-21.
MLA	P. Y.,et al."Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm".Bioelectrochemistry 101(2015):14-21.