Effect of Cu Addition to 2205 Duplex Stainless Steel on the Resistance against Pitting Corrosion by the Pseudomonas aeruginosa Biofilm
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第7期
论文作者：Ping Li Yang Zhao Yuzhi Liu Ying Zhao Dake Xu Chunguang Yang Tao Zhang Tingyue Gu Ke Yang
文章页码：723 - 727
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.
Ping Li1,2，Yang Zhao1,2，Yuzhi Liu1，Ying Zhao3，Dake Xu2，Chunguang Yang2，Tao Zhang1,2，Tingyue Gu4，Ke Yang2
1. Corrosion and Protection Laboratory, Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Ministry of Education2. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences3. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences4. Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University
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.
关键词：
