EFFECTS OF SHEWANELLA ALGAE ON CORROSION OF Zn-Al-Cd ANODE

doi:10.3724/SP.J.1037.2012.00309

	EFFECTS OF SHEWANELLA ALGAE ON CORROSION OF Zn-Al-Cd ANODE
	Zhang Jie1 ; Song Xiuxia 1,2; Luan Xin 1,3; Sun Caixia 1,4; Duan Jizhou 1; Hou Baorong 1; Zhang, J (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
	2012-12-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	48 期号:12 页码:1495-1502
文章类型	Article
摘要	Shewanella is a typical iron-reducing bacteria which can reduce insoluble ferric iron to soluble ferrous iron and consume oxygen, being considered as the reasons of corrosion inhibition. The main study on Shewanella algae (SA) is the degradation of environmentally harmful organic compounds and heavy metals, and there are very few reports on the interaction of metal corrosion and SA. In this paper, the bacteria isolated from yellow rust layer were identified as SA by using molecular biology techniques. The growth curve of SA was determined with spectrophotography. The results showed that the growth curve was divided into three phases: exponential growth phase, steady phase and decay phase. The effects of SA on corrosion of Zn-Al-Cd anode were investigated by using electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and fluorescence microscopy (FM). The results showed that corrosion potential for samples exposed to the culture medium containing SA was higher than that for samples exposed to the sterile culture medium during the whole experiment. R-ct value in the culture medium containing SA was much greater than that of anode in the sterile culture medium. The bacteria could inhibit the corrosion of the specimen. The reason was that a biofilm layer was formed on the sample surface and the oxygen was consumed through the metabolic activities of bacteria in the culture medium containing bacteria. The biofilm layer was formed on the 5th day in the culture medium containing bacteria. While in bacteria-free system, obvious corrosion pits and white corrosion products were seen on the sample surface. The complete biofilm was formed on 7th day, and it detached from the sample on 11th day because of the exhaustion of nutrients and oxygen, showing that the biofilm formation had a great relationship with the presence of nutrients and oxygen.
关键词	Shewanella Sacrificial Anode Electrochemical Impedance Spectroscopy Molecular Biology Corrosion
学科领域	Metallurgy & Metallurgical Engineering
DOI	10.3724/SP.J.1037.2012.00309
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000312687800013
引用统计	被引频次：7[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/337002/12465
专题	海洋环境腐蚀与生物污损重点实验室实验海洋生物学重点实验室
通讯作者	Zhang, J (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China 3.Ocean Univ China, Coll Marine Life Sci, Qingdao 266100, Peoples R China 4.Yantai Univ, Chem & Chem Engn Coll, Yantai 264005, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhang Jie,Song Xiuxia,Luan Xin,et al. EFFECTS OF SHEWANELLA ALGAE ON CORROSION OF Zn-Al-Cd ANODE[J]. ACTA METALLURGICA SINICA,2012,48(12):1495-1502.
APA	Zhang Jie.,Song Xiuxia.,Luan Xin.,Sun Caixia.,Duan Jizhou.,...&Zhang, J .(2012).EFFECTS OF SHEWANELLA ALGAE ON CORROSION OF Zn-Al-Cd ANODE.ACTA METALLURGICA SINICA,48(12),1495-1502.
MLA	Zhang Jie,et al."EFFECTS OF SHEWANELLA ALGAE ON CORROSION OF Zn-Al-Cd ANODE".ACTA METALLURGICA SINICA 48.12(2012):1495-1502.

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