Study on Microbiologically Influenced Corrosion Behavior of Novel Cu-Bearing Pipeline Steels
Shi Xianbo1,2; Xu Dake1; Yan Maocheng1; Yan Wei1; Shan Yiyin1; Yang Ke1
Corresponding AuthorYang Ke(
AbstractMicrobiologically influenced corrosion (MIC) is a major corrosion related problem for steel pipelines. The great loss caused by microbiologically influenced corrosion (MIC) on buried pipelines has been paid considerable attention domestically and internationally. Various physical, chemical or biological strategies have been used for MIC control, including biocides, coatings, cathodic protection and biocompetitive exclusion. These strategies have limitations of being expensive, subject to environmental restrictions, and sometimes inefficient. There is an urgent need for oil industry to develop environmentally friendly strategies for microbial corrosion control. Cu could play many benefical effects in steels, such as exerting a vigorous effect on hardenability, enhancing strength via precipitation strengthening, improving fatigue resistance, reducing susceptibility of hydrogen embrittlement, promoting formation protective layer etc.. Cu is well known for its inherent antimicrobial properties and is the focus of interest for potential application as a component in antibacterial materials. The Cu-bearing antibacterial stainless steel, characterized by continuous release of Cu ions with antibacterial function, provides analogy to develop a new type of MIC resistance pipeline steel. In this work, three different Cu contents (1.06Cu, 1.46Cu, 2.00Cu, mass fraction, %) pipeline steels, named 1.0Cu, 1.5Cu and 2.0Cu, were fabricated by making proper Cu alloying designs for X80 steel that currently used in oil/gas industry. Study on antibacterial performance and MIC behavior of novel Cu-bearing pipeline steels against Escherichiacoli (E.coli), Staphylococcusaureus (S.aureus) and Sulphate reducing bacteria (SRB) was carried out by antibacterial tests, electrochemistrical monitor, corrosion product analyses and confocal laser scanning microscope (CLSM). The results showed that Cu-bearing pipeline steels had strong antibacterial performance against E.coli and S.aureus compared with X80 steel. 1.0Cu steel with the microstructure of polygonal ferrite showed excellent resistance to SRB with remarkable strength enhancement by nano-scale Cu-rich precipitates and good impact toughness compared with X80 steel. Cu-rich precipitates in Cu-bearing pipeline steels were found to be responsible for the antibacterial capability. The linear polarization resistances (R-LPR) of both X80 and 1.0Cu steels in the soil-extract solution with SRB were dramatically decreased after 2 d, leading to the corrosion current density (i(oorr).) value of X80 steel was much higher than that of 1.0Cu steel. The corrosion product analysis results showed that much biofilm produced by SRB was the reason that many pits and larger pit depth on X80 steel than that of 1.0Cu steel.
Keywordpipeline steel Cu microbiologically influenced corrosion Cu-rich phase antibacterial performance
Funding OrganizationNational Key Technology Support Program ; National Natural Science Foundation of China
Indexed BySCI
Funding ProjectNational Key Technology Support Program[2011BAE25B03] ; National Natural Science Foundation of China[51271175]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000395966800003
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorYang Ke
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Shi Xianbo,Xu Dake,Yan Maocheng,et al. Study on Microbiologically Influenced Corrosion Behavior of Novel Cu-Bearing Pipeline Steels[J]. ACTA METALLURGICA SINICA,2017,53(2):153-162.
APA Shi Xianbo,Xu Dake,Yan Maocheng,Yan Wei,Shan Yiyin,&Yang Ke.(2017).Study on Microbiologically Influenced Corrosion Behavior of Novel Cu-Bearing Pipeline Steels.ACTA METALLURGICA SINICA,53(2),153-162.
MLA Shi Xianbo,et al."Study on Microbiologically Influenced Corrosion Behavior of Novel Cu-Bearing Pipeline Steels".ACTA METALLURGICA SINICA 53.2(2017):153-162.
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