Laboratory investigation of the microbiologically influenced corrosion (MIC) resistance of a novel Cu-bearing 2205 duplex stainless steel in the presence of an aerobic marine Pseudomonas aeruginosa biofilm

The microbiologically influenced corrosion (MIC) resistance of a novel Cu-bearing 2205 duplex stainless steel (2205 Cu-DSS) against an aerobic marine Pseudomonas aeruginosa biofilm was investigated. The electrochemical test results showed that R p increased and i corr decreased sharply after long-te...

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Bibliographic Details
Published in:Biofouling (Chur, Switzerland) Switzerland), 2015-07, Vol.31 (6), p.481-492
Main Authors: Xia, Jin, Yang, Chunguang, Xu, Dake, Sun, Da, Nan, Li, Sun, Ziqing, Li, Qi, Gu, Tingyue, Yang, Ke
Format: Article
Language:English
Subjects:
2205 Cu-DSS
Anti-Bacterial Agents - pharmacology
antimicrobial
biofilm
Biofilms - drug effects
Copper - adverse effects
Copper - analysis
Corrosion
MIC
Microscopy, Fluorescence
Pseudomonas aeruginosa
Pseudomonas aeruginosa - metabolism
Stainless Steel - chemistry
Stainless Steel - standards
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Summary:The microbiologically influenced corrosion (MIC) resistance of a novel Cu-bearing 2205 duplex stainless steel (2205 Cu-DSS) against an aerobic marine Pseudomonas aeruginosa biofilm was investigated. The electrochemical test results showed that R p increased and i corr decreased sharply after long-term immersion in the inoculation medium, suggesting that 2205 Cu-DSS possessed excellent MIC resistance to the P. aeruginosa biofilm. Fluorescence microscope images showed that 2205 Cu-DSS possessed a strong antibacterial ability, and its antibacterial efficiency after one and seven days was 7.75% and 96.92%, respectively. The pit morphology comparison after 14 days between 2205 DSS and 2205 Cu-DSS demonstrated that the latter showed a considerably reduced maximum MIC pit depth compared with the former (1.44 μm vs 9.50 μm). The experimental results suggest that inhibition of the biofilm was caused by the copper ions released from the 2205 Cu-DSS, leading to its effective mitigation of MIC by P. aeruginosa.
ISSN:0892-7014
1029-2454
DOI:10.1080/08927014.2015.1062089