J. Mater. Sci. Technol. ›› 2017, Vol. 33 ›› Issue (7): 723-733.DOI: 10.1016/j.jmst.2016.11.020

Special Issue: 2017腐蚀与防护专辑

• Orginal Article • Previous Articles     Next Articles

Effect of Cu Addition to 2205 Duplex Stainless Steel on the Resistance against Pitting Corrosion by the Pseudomonas aeruginosa Biofilm

Li Ping1, Zhao Yang1,2, Liu Yuzhi1, Zhao Ying3, Xu Dake2,*(), Yang Chunguang2, Zhang Tao1,2,*(), Gu Tingyue4, Yang Ke2   

  1. 1 Corrosion and Protection Laboratory, Key Laboratory of Superlight Materials and Surface Technology, Harbin Engineering University, Ministry of Education, 145 Nantong Street, Harbin 150001, China
    2 State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    3 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
    4 Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH 45701, USA
  • Received:2016-06-15 Revised:2016-10-08 Accepted:2016-11-11 Online:2017-07-20 Published:2017-08-29
  • Contact: Xu Dake,Zhang Tao
  • About author:

    These authors contributed equally to this work.

Abstract:

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.

Key words: Duplex stainless steel, Copper, Microbiologically influenced corrosion, Pitting corrosion, Antibacterial, Pseudomonas aeruginosa