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Enhanced resistance of 2205 Cu-bearing duplex stainless steel towards microbiologically influenced corrosion by marine aerobic Pseudomonas aeruginosa biofilms

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Xu Dake 1,2,3   Zhou Enze 1   Zhao Ying 4   Li Huabing 5   Liu Zhiyong 2   Zhang Dawei 2 *   Yang Chunguang 3 *   Lin Hai 2   Li Xiaogang 2   Yang Ke 3  
文摘 An antibacterial 2205-Cu duplex stainless steel (DSS) was shown to inhibit the formation and growth of corrosive marine biofilms by direct contact with copper-rich phases and the release of Cu~(2+) ions from the 2205-Cu DSS surface. In this work, the microbiologically influenced corrosion (MIC) resistance of 2205- Cu DSS in the presence of the corrosive marine bacterium Pseudomonas aeruginosa was investigated. The addition of copper improved the mechanical properties such as the yield strength, the tensile strength and the hardness of 2205 DSS. Electrochemical test results from linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and critical pitting temperature (CPT) measurements showed that 2205-Cu DSS possessed a larger polarization resistance (R_p), charge transfer resistance (R_(ct)) and CPT values, indicating the excellent MIC resistance of 2205-Cu DSS against the corrosive P. aeruginosa biofilm. The live/dead staining results and the SEM images of biofilm confirmed the strong antibacterial ability of 2205-Cu DSS. The largest pit depth of 2205-Cu DSS was considerably smaller than that of 2205 DSS after 14 d in the presence of P. aeruginosa (2.2µm vs 12.5µm). 2205-Cu DSS possessed a superior MIC resistance to regular 2205 DSS in the presence of aerobic P. aeruginosa.
来源 Journal of Materials Science & Technology ,2018,34(8):1325-1336 【核心库】
DOI 10.1016/j.jmst.2017.11.025
关键词 Microbiologically influenced corrosion Cu-bearing duplex stainless steel ; Pseudomonas aeruginosa ; Antibacterial
地址

1. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819  

2. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing, 100083  

3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016  

4. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055  

5. School of Metallurgy, Northeastern University, Shenyang, 110819

语种 英文
文献类型 研究性论文
ISSN 1005-0302
学科 金属学与金属工艺
基金 国家自然科学基金 ;  Shenzhen Science and Technology Research Funding ;  国家973计划 ;  the National Environmental Corrosion Platform (NECP) ;  partially based on CORROSION/2016 Conference Proceeding
文献收藏号 CSCD:6308745

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引证文献 6

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2 许萍 金属表面混合微生物腐蚀及分析方法研究进展 表面技术,2019,48(1):216-224
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