Influence of biofilms growth on corrosion potential of metals immersed in seawater

doi:10.1002/maco.200303690

	Influence of biofilms growth on corrosion potential of metals immersed in seawater
	Wang, W ; Wang, J ; Li, X ; Xu, H ; Wu, J
	2004
发表期刊	MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
ISSN	0947-5117
卷号	55 期号:1 页码:30-35
文章类型	Article
摘要	The changes of corrosion potential (E-corr) of metals immersed in seawater were investigated with electrochemical technology and epifluoresence microscopy. In natural seawater, changes of E-corr were determined by the surface corrosion state of the metal. E-corr of passive metals exposed to natural seawater shifted to noble direction for about 150 mV in one day and it didn't change in sterile seawater. The in-situ observation showed that biofilms settled on the surfaces of passive metals when E-corr moved in noble direction. The bacteria number increased on the metal surface according to exponential law and it was in the same way with the ennoblement of E-corr. The attachment of bacteria during the initial period played an important role in the ennoblement of E-corr and it is believed that the carbohydrate and protein in the biofilm are reasons for this phenomenon. The double layer capacitance (C-dl) of passive metals decreased with time when immersed in natural seawater, while remained almost unchanged in sterile seawater. The increased thickness and reduced dielectric constant of C-dl may be reasons.; The changes of corrosion potential (E-corr) of metals immersed in seawater were investigated with electrochemical technology and epifluoresence microscopy. In natural seawater, changes of E-corr were determined by the surface corrosion state of the metal. E-corr of passive metals exposed to natural seawater shifted to noble direction for about 150 mV in one day and it didn't change in sterile seawater. The in-situ observation showed that biofilms settled on the surfaces of passive metals when E-corr moved in noble direction. The bacteria number increased on the metal surface according to exponential law and it was in the same way with the ennoblement of E-corr. The attachment of bacteria during the initial period played an important role in the ennoblement of E-corr and it is believed that the carbohydrate and protein in the biofilm are reasons for this phenomenon. The double layer capacitance (C-dl) of passive metals decreased with time when immersed in natural seawater, while remained almost unchanged in sterile seawater. The increased thickness and reduced dielectric constant of C-dl may be reasons.
关键词	Stainless-steels Diminution Reduction Oxygen
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
DOI	10.1002/maco.200303690
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000188718300005
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2326
专题	海洋环境腐蚀与生物污损重点实验室
作者单位	1.Acad Sinica, Inst Oceanol, Qingdao 266071, Peoples R China 2.Acad Sinica, Grad Sch, Beijing 100039, Peoples R China 3.Ocean Univ Qingdao, Chem & Chem Engn Coll, Qingdao 266003, Peoples R China 4.State Key Lab Corros & Protect, New Delhi 110016, India 5.Luoyang Ship Mat Res Inst, Qingdao Branch, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Wang, W,Wang, J,Li, X,et al. Influence of biofilms growth on corrosion potential of metals immersed in seawater[J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,2004,55(1):30-35.
APA	Wang, W,Wang, J,Li, X,Xu, H,&Wu, J.(2004).Influence of biofilms growth on corrosion potential of metals immersed in seawater.MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,55(1),30-35.
MLA	Wang, W,et al."Influence of biofilms growth on corrosion potential of metals immersed in seawater".MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION 55.1(2004):30-35.

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