title: Microbiologically Influenced Corrosion of 2707 Hyper-Duplex Stainless Steel by Marine Pseudomonas aeruginosa Biofilm.
abstract: Microbiologically Influenced Corrosion (MIC) is a serious problem in many industries because it causes huge economic losses. Due to its excellent resistance to chemical corrosion, 2707 hyper duplex stainless steel (2707 HDSS) has been used in the marine environment. However, its resistance to MIC was not experimentally proven. In this study, the MIC behavior of 2707 HDSS caused by the marine aerobe Pseudomonas aeruginosa was investigated. Electrochemical analyses demonstrated a positive shift in the corrosion potential and an increase in the corrosion current density in the presence of the P. aeruginosa biofilm in the 2216E medium. X-ray photoelectron spectroscopy (XPS) analysis results showed a decrease in Cr content on the coupon surface beneath the biofilm. The pit imaging analysis showed that the P. aeruginosa biofilm caused a largest pit depth of 0.69 μm in 14 days of incubation. Although this was quite small, it indicated that 2707 HDSS was not completely immune to MIC by the P. aeruginosa biofilm.
authors: School of Metallurgy, Northeastern University, Shenyang, 110819, China.
authors: Huabing
authors: H
authors: Li
authors: School of Metallurgy, Northeastern University, Shenyang, 110819, China.
authors: Enze
authors: E
authors: Zhou
authors: Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, P. R. China.
authors: Dawei
authors: D
authors: Zhang
authors: Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
authors: Dake
authors: D
authors: Xu
authors: College of Chemistry, Liaoning University, Shenyang, 110036, China.
authors: Jin
authors: J
authors: Xia
authors: Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
authors: Chunguang
authors: C
authors: Yang
authors: School of Metallurgy, Northeastern University, Shenyang, 110819, China.
authors: Hao
authors: H
authors: Feng
authors: School of Metallurgy, Northeastern University, Shenyang, 110819, China.
authors: Zhouhua
authors: Z
authors: Jiang
authors: Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, P. R. China.
authors: Xiaogang
authors: X
authors: Li
authors: Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, Ohio 45701, USA.
authors: Tingyue
authors: T
authors: Gu
authors: Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.
authors: Ke
authors: K
authors: Yang
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D002857:Chromium / Q000737:chemistry; D003343:Corrosion; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D018613:Microscopy, Confocal; D056951:Photoelectron Spectroscopy; D011550:Pseudomonas aeruginosa / Q000502:physiology*; D013193:Stainless Steel / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D002857:Chromium; D013193:Stainless Steel