IOCAS-IR  > 海洋环境腐蚀与与生物污损重点实验室
Influence of Sulfate-Reducing Bacteria on the Corrosion Behavior of High Strength Steel EQ70 under Cathodic Polarization
Guan, Fang1,2; Zhai, Xiaofan1; Duan, Jizhou1; Zhang, Meixia1,2; Hou, Baorong1
2016-09-07
Source PublicationPLOS ONE
Volume11Issue:9
SubtypeArticle
AbstractCertain species of sulfate- reducing bacteria (SRB) use cathodes as electron donors for metabolism, and this electron transfer process may influence the proper protection potential choice for structures. The interaction between SRB and polarized electrodes had been the focus of numerous investigations. In this paper, the impact of cathodic protection (CP) on Desulfovibrio caledoniens metabolic activity and its influence on highs trength steel EQ70 were studied by bacterial analyses and electrochemical measurements. The results showed that EQ70 under -0.85 V-SCE CP had a higher corrosion rate than that without CP, while EQ70 with -1.05 V-SCE had a lower corrosion rate. The enhanced SRB metabolic activity at -0.85 V-SCE was most probably caused by the direct electron transfer from the electrode polarized at -0.85 V-SCE. This direct electron transfer pathway was unavailable in -1.05 V-SCE. In addition, the application of cathodic protection led to the transformation of sulfide rusts into carbonates rusts. These observations have been employed to provide updated recommendations for the optimum CP potential for steel structures in the presence of SRB.
DOI10.1371/journal.pone.0162315
Indexed BySCI
Language英语
WOS IDWOS:000383255200057
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/135889
Collection海洋环境腐蚀与与生物污损重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Marine Corros & Protect Ctr, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationKey Laboratory of Marine Environmental Corrosion and Bio-fouling, IOCAS
Recommended Citation
GB/T 7714
Guan, Fang,Zhai, Xiaofan,Duan, Jizhou,et al. Influence of Sulfate-Reducing Bacteria on the Corrosion Behavior of High Strength Steel EQ70 under Cathodic Polarization[J]. PLOS ONE,2016,11(9).
APA Guan, Fang,Zhai, Xiaofan,Duan, Jizhou,Zhang, Meixia,&Hou, Baorong.(2016).Influence of Sulfate-Reducing Bacteria on the Corrosion Behavior of High Strength Steel EQ70 under Cathodic Polarization.PLOS ONE,11(9).
MLA Guan, Fang,et al."Influence of Sulfate-Reducing Bacteria on the Corrosion Behavior of High Strength Steel EQ70 under Cathodic Polarization".PLOS ONE 11.9(2016).
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