Biofilm inhibition and corrosion resistance of 2205-Cu duplex stainless steel against acid producing bacterium Acetobacter aceti |
| |
| Affiliation: | School of Metallurgy, Northeastern University, Shenyang, 110819, China;Mary Kay O'Connor Process Safety Center, Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA;Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang, 110819, China;Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China;Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;General Research Institute for Nonferrous Metals, Beijing, 100088, China;Department of Chemical and Biomolecular Engineering, Institute for Corrosion and Multiphase Technology, Ohio University, Athens, OH 45701, USA |
| |
| Abstract: | Acid producing bacterium Acetobacter aceti causes pitting corrosion of stainless steel (SS). This work investigated the enhanced resistance of 2205-Cu duplex stainless steel (DSS) against biocorrosion by A. aceti in comparison with 2205 DSS using electrochemical and surface analysis techniques. With the addition of Cu to 2205 DSS, biofilms on the 2205-Cu DSS surface were inhibited effectively. The largest pit depth on 2205-Cu DSS surface in the presence of A. aceti was 2.6 μm, smaller than 5.5 μm for 2205 DSS surface. The icorr was 0.42 ± 0.03 μA cm−2 for 2205-Cu DSS in the biotic medium, which was much lower than that for 2205 DSS (3.69 ± 0.65 μA cm−2). All the results indicated that the A. aceti biofilm was considerably inhibited by the release of Cu2+ ions from the 2205-Cu DSS matrix, resulting in the mitigation of biocorrosion by A. aceti. |
| |
| Keywords: | Duplex stainless steel Acid producing bacteria Microbiologically influenced corrosion Pitting corrosion |
| 本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录！ |
|
