Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 48, Issue -, Pages 228-234Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2014.12.004
Keywords
304L stainless steel; MIC; Pitting corrosion; Copper; Antibacterial stainless steel
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Funding
- National Natural Science Foundation of China [51101154, 51371168]
- National Basic Research Program [2012CB619101]
- Shenyang National Lab for Material Science
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Cu-bearing antibacterial stainless steels have been gaining popularity in recent years due to their strong antibacterial performances. However, only a few studies were reported for their actual performances against microbiologically influenced corrosion (MIC). In this study, electrochemical methods and surface analytical techniques were applied to study the MIC resistance characteristics of a 304L-Cu stainless steel (SS) against Escherichia coli in comparison with 304L SS as control. Corrosion tests for specimens after a 21-day exposure to a Luria-Bertani (LB) culture medium with E. coli demonstrated that the 304L-Cu SS considerably reduced the maximum MIC pit depth and the specific weight loss compared with 304L SS (83 mu m and 02 mg/cm(2) vs. 13.4 mu m and 0.6 mg/cm(2)). Potentiodynamic polarization tests showed that the corrosion current density of the 304L-Cu SS was as much as 4 times lower than that of the 304L SS, indicating that the 304L-Cu SS is abetter choice for applications in MIC-prone environments. (C) 2014 Elsevier B.V. All rights reserved.
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