期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 33, 期 7, 页码 723-727出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2016.11.020
关键词
Duplex stainless steel; Copper; Microbiologically influenced corrosion; Pitting corrosion; Antibacterial; Pseudomonas aeruginosa
资金
- Shenzhen Science and Technology Research funding [JCYJ20160608153641020]
- National Basic Research Program of China (973 Program Project) [2014CB643300]
- National Natural Science Foundation [51501203, U1660118]
- National Environmental Corrosion Platform (NECP)
- Young Merit Scholars program of the Institute of Metal Research, Chinese Academy of Sciences
- program of Outstanding Young Scholars, the National Natural Science Foundation of China [51371182]
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. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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