摘要
The effect of copper addition to 2205 duplex stainless steel（DSS） on its resistance against pitting corrosion by the Pseudomonas aeruginosa biofilm was investigated using electrochemical and surface analysis techniques. Cu addition decreased the general corrosion resistance, resulting in a higher general corrosion rate in the sterile medium. Because DSS usually has a very small general corrosion rate, its pitting corrosion resistance is far more important. In this work, it was shown that 2205-3%Cu DSS exhibited a much higher pitting corrosion resistance against the P. aeruginosa biofilm compared with the 2205 DSS control, characterized by no significant change in the pitting potential and critical pitting temperature（CPT） values. The strong pitting resistance ability of 2205-3%Cu DSS could be attributed to the copper-rich phases on the surface and the release of copper ions, providing a strong antibacterial ability that inhibited the attachment and growth of the corrosive P. aeruginosa biofilm.
The effect of copper addition to 2205 duplex stainless steel（DSS） on its resistance against pitting corrosion by the Pseudomonas aeruginosa biofilm was investigated using electrochemical and surface analysis techniques. Cu addition decreased the general corrosion resistance, resulting in a higher general corrosion rate in the sterile medium. Because DSS usually has a very small general corrosion rate, its pitting corrosion resistance is far more important. In this work, it was shown that 2205-3%Cu DSS exhibited a much higher pitting corrosion resistance against the P. aeruginosa biofilm compared with the 2205 DSS control, characterized by no significant change in the pitting potential and critical pitting temperature（CPT） values. The strong pitting resistance ability of 2205-3%Cu DSS could be attributed to the copper-rich phases on the surface and the release of copper ions, providing a strong antibacterial ability that inhibited the attachment and growth of the corrosive P. aeruginosa biofilm.
作者
Ping Li
Yang Zhao
Yuzhi Liu
Ying Zhao
Dake Xu
Chunguang Yang
Tao Zhang
Tingyue Gu
Ke Yang
Ping Li;Yang Zhao;Yuzhi Liu;Ying Zhao;Dake Xu;Chunguang Yang;Tao Zhang;Tingyue Gu;Ke Yang(Corrosion and Protection Laboratory, Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Ministry of Education, 145 Nantong Street, Harbin 150001, China;State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 5henzhen, China;Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH 45701, USA)
基金
support of the program of Outstanding Young Scholars, the National Natural Science Foundation of China (No. 51371182)
financially supported by Shenzhen Science and Technology Research funding (JCYJ20160608153641020)
the National Basic Research Program of China (973 Program Project No. 2014CB643300)
the National Natural Science Foundation (No. 51501203 and U1660118)
the National Environmental Corrosion Platform (NECP)
the “Young Merit Scholars” program of the Institute of Metal Research, Chinese Academy of Sciences
