对比分析了Q235钢在无Fe2+的接菌培养基和Fe2浓度为30mg/L的接菌培养基中的腐蚀行为.使用光学显微镜跟踪观察Q235钢在两种介质中的表面形貌随时间的变化,用电化学阻抗谱研究Q235钢在两种培养基中的电化学行为.用聚焦离子束显微镜制作Q235钢在两种培养基中的腐蚀产物剖面,并用能谱对腐蚀产物进行成分分析.对电化学阻抗谱所得结果进行拟合,结果表明,Fe2会使Q235钢表面形成的生物膜电阻降低,电容升高,Q235钢反应电阻保持较低,从而使反应持续进行,铁不断溶解.培养基中加入30mg/L的Fe2+后,Q235钢表面附着的细菌显著增多,形成的生物膜厚而疏松,膜中混合有腐蚀产物硫化物,膜下的金属出现众多微小的点蚀.电化学阻抗谱拟合结果与形貌观察及成分分析结果吻合,Fe2+对Q235钢的SRB腐蚀反应具有催化作用.
参考文献
| [1] | Beech WB;Sunner J .Biocorrosion: towards understanding interactions between biofilms and metals [Review][J].Current Opinion in Biotechnology,2004(3):181-186. |
| [2] | BEECH I B;CHEUNG C W S .Interactions of exopolymers produced by sulphate-reducing bacteria with metal ions[J].International Biodeterioration and Biodegradation,1995,35(1-3):59-72. |
| [3] | 任南琪.废水厌氧处理硫酸盐还原菌生态学[M].北京:科学出版社,2009 |
| [4] | RAO T S;SAIRAM T N;VISWANATHAN B et al.Carbon steel corrosion by iron oxidising and sulphate reducing bacteria in a freshwater cooling system[J].Corrosion Science,2000,42(08):1417-1431. |
| [5] | Zuo R.;Ornek D.;Syrett BC.;Green RM.;Hsu CH.;Mansfeld FB.;Wood TK. .Inhibiting mild steel corrosion from sulfate-reducing bacteria using antimicrobial-producing biofilms in Three-Mile-Island process water[J].Applied Microbiology and Biotechnology,2004(2):275-283. |
| [6] | Neria Gonzalez I;Wang ET;Ramirez F;Romero JM;Hernandez Rodriguez C .Characterization of bacterial community associated to biofilms of corroded oil pipelines from the southeast of Mexico.[J].Anaerobe,2006(3):122-133. |
| [7] | Iwona B. Beech;Sheelagh A. Campbell .Accelerated low water corrosion of carbon steel in the presence of a biofilm harbouring sulphate-reducing and sulphur-oxidising bacteria recovered from a marine sediment[J].Electrochimica Acta,2008(1):14-21. |
| [8] | CLELAND J H .Corrosion risks in ships ballast tanks and the IMO pathogen guidelines[J].Engineering Failure Analysis,1995,2(01):79-84. |
| [9] | Johansson Leena-Sisko;Saastamoinen Tuomas .Investigating early stages of biocorrosion with XPS: AISI 304 stainless steel exposed to Burkholderia species[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,1999(0):244-248. |
| [10] | MARCHAL Re' my;CHAUSSEPIED Bernard;WARZYWODA Michel .Effect of ferrous ion availability on growth of a corroding sulfate-reducing bacterium[J].International Biodeterioration and Biodegradation,2001,47(03):125-131. |
| [11] | VIDELA;Héctor A;HERRERA et al.Microbiologically influenced corrosion-looking to the future[J].International Journal of Hydrogen Energy,2005,8:169-180. |
| [12] | Sheng XX;Ting YP;Pehkonen SO .The influence of ionic strength, nutrients and pH on bacterial adhesion to metals[J].Journal of Colloid and Interface Science,2008(2):256-264. |
| [13] | Fei Kuang;Jia Wang;Li Yan;Dun Zhang .Effects of sulfate-reducing bacteria on the corrosion behavior of carbon steel[J].Electrochimica Acta,2007(20):6084-6088. |
| [14] | LEE A K;NEWMAN D K .Microbial iron respiration:impacts on corrosion processes[J].Applied Microbiology and Biotechnology,2003,62:134-139. |
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