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

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

参考文献共 56 共3页

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