title: 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.
abstract: 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 Rp increased and icorr 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.
authors.affiliation: a College of Chemistry , Liaoning University , Shenyang , China.
authors.forename: Jin
authors.initials: J
authors.lastname: Xia
authors.forename: Chunguang
authors.initials: C
authors.lastname: Yang
authors.forename: Dake
authors.initials: D
authors.lastname: Xu
authors.forename: Da
authors.initials: D
authors.lastname: Sun
authors.forename: Li
authors.initials: L
authors.lastname: Nan
authors.forename: Ziqing
authors.initials: Z
authors.lastname: Sun
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Tingyue
authors.initials: T
authors.lastname: Gu
authors.forename: Ke
authors.initials: K
authors.lastname: Yang
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D018441:Biofilms / Q000187:drug effects*; D003300:Copper / Q000009:adverse effects / Q000032:analysis; D003343:Corrosion; D008856:Microscopy, Fluorescence; D011550:Pseudomonas aeruginosa / Q000378:metabolism*; D013193:Stainless Steel / Q000737:chemistry* / Q000592:standards*
chemical_list: D000900:Anti-Bacterial Agents; D013193:Stainless Steel; D003300:Copper
keywords: 2205 Cu-DSS; MIC; Pseudomonas aeruginosa; antimicrobial; biofilm