Biofilm inhibition and corrosion resistance of 2205-Cu duplex stainless steel against acid producing bacterium Acetobacter aceti  

作　　者：Dan Liu Ru Jia Dake Xu Hongying Yang Ying Zhao Msaleem Khan Songtao Huang Jiankang Wen Ke Yang Tingyue Gug 

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang,110819,China [2]Mary Kay O'Connor Process Safety Center,Artie McFerrin Department of Chemical Engineering,Texas A&M University,College Station,TX 77843,USA [3]Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang,110819,China [4]Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518055,China [5]Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [6]General Research Institute for Nonferrous Metals,Beijing,100088,China [7]Department of Chemical and Biomolecular Engineering,Institute for Corrosion and Multiphase Technology,Ohio University,Athens,OH 45701,USA

出　　处：《Journal of Materials Science & Technology》2019年第11期2494-2502,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.U1608254);Shenzhen Science and Technology Research Funding (No.JCYJ20160608153641020);the Open Fund of State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores (Nos.ZJKY2017(B)KFJJ01 and ZJKY2017(B)KFJ02)

摘　　要：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 2.6μm,smaller than 5.5μm for 2205 DSS surface.The i(corr)was 0.42±0.03μA cm^-2 for 2205-Cu DSS in the biotic medium,which was much lower than that for 2205 DSS(3.69±0.65μA cm^-2).All the results indicated that the A aceti biofilm was considerably inhibited by the release of Cu^2+ions from the 2205-Cu DSS matrix,resulting in the mitigation of biocorrosion by A aceti.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.

关 键 词：Duplex stainless steel Acid producing bacteria Microbiologically influenced corrosion Pitting corrosion 

分 类 号：TG142.71[一般工业技术—材料科学与工程]