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	Microbiologically influenced corrosion behavior of S32654 super austenitic stainless steel in the presence of marine Pseudomonas aeruginosa biofilm
	Li, Huabing; Yang, Chuntian; Zhou, Enze; Yang, Chunguang; Feng, Hao; Jiang, Zhouhua; Xu, Dake; Gu, Tingyue; Yang, Ke; Yang, CG
刊名	JOURNAL MATER SCI TECHNOL
	2017-12-01
卷号	33期号:12页码:1596-1603
关键词	Microbiologically Influenced Corrosion Super Austenitic Stainless Steel Pseudomonas Aeruginosa Biofilm Pitting Corrosion
ISSN号	1005-0302
英文摘要	S32654 super austenitic stainless steel (SASS) is widely used in highly corrosive environments. However, its microbiologically influenced corrosion (MIC) behavior has not been reported yet. In this study, the corrosion behavior of S32654 SASS caused by a corrosive marine bacterium Pseudomonas aeruginosa was investigated using electrochemical measurements and surface analysis techniques. It was found that P. aeruginosa biofilm accelerated the corrosion rate of S325654 SASS, which was demonstrated by a negative shift of the open circuit potential (E-OCP), a decrease of polarization resistance and an increase of corrosion current density in the culture medium. The largest pit depth of the coupons exposed in the P. aeruginosa broth for 14 days was 2.83 mu m, much deeper than that of the control (1.33 mu m) in the abiotic culture medium. It was likely that the P. aeruginosa biofilm catalyzed the formation of CrO3, which was detrimental to the passive film, resulting in MIC pitting corrosion. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; S32654 super austenitic stainless steel (SASS) is widely used in highly corrosive environments. However, its microbiologically influenced corrosion (MIC) behavior has not been reported yet. In this study, the corrosion behavior of S32654 SASS caused by a corrosive marine bacterium Pseudomonas aeruginosa was investigated using electrochemical measurements and surface analysis techniques. It was found that P. aeruginosa biofilm accelerated the corrosion rate of S325654 SASS, which was demonstrated by a negative shift of the open circuit potential (E-OCP), a decrease of polarization resistance and an increase of corrosion current density in the culture medium. The largest pit depth of the coupons exposed in the P. aeruginosa broth for 14 days was 2.83 mu m, much deeper than that of the control (1.33 mu m) in the abiotic culture medium. It was likely that the P. aeruginosa biofilm catalyzed the formation of CrO3, which was detrimental to the passive film, resulting in MIC pitting corrosion. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	High Technology Research and Development Program of China [2015AA034301]; National Natural Science Foundation of China [51304041, U1660118]; Fundamental Research Funds for the Central Universities [N150204007]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78941]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, CG; Xu, DK (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Li, Huabing,Yang, Chuntian,Zhou, Enze,et al. Microbiologically influenced corrosion behavior of S32654 super austenitic stainless steel in the presence of marine Pseudomonas aeruginosa biofilm[J]. JOURNAL MATER SCI TECHNOL,2017,33(12):1596-1603.
APA	Li, Huabing.,Yang, Chuntian.,Zhou, Enze.,Yang, Chunguang.,Feng, Hao.,...&Xu, DK .(2017).Microbiologically influenced corrosion behavior of S32654 super austenitic stainless steel in the presence of marine Pseudomonas aeruginosa biofilm.JOURNAL MATER SCI TECHNOL,33(12),1596-1603.
MLA	Li, Huabing,et al."Microbiologically influenced corrosion behavior of S32654 super austenitic stainless steel in the presence of marine Pseudomonas aeruginosa biofilm".JOURNAL MATER SCI TECHNOL 33.12(2017):1596-1603.

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