再生水中柠檬酸杆菌对铜合金腐蚀机理研究

摘要

With Citrobacter freundii in reclaimed water as the research object,the structure features of the biofilm on the surface of HSn70-1AB copper alloy was studied from aspects of micro-morphology characteristics,thermal analysis and so on using atomic force microscopy(AFM),contact angle measurement,scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS) and some other methods; meanwhile,the effect of hydrophobicity of the biofilm on its structure and the corrosion mechanism of HSn70-1AB copper alloy were also analyzed.The study results showed that,the uniformity of the said alloy gradually deteriorated along with the soaking time; benefited from the strong hydrophilicity,the whole structure of the biofilm was integrated at later stage; the corrosion of Citrobacterfreundii to HSn70-1AB was mainly represented as localized corrosion,especially pitting corrosion.%以再生水中弗氏柠檬酸杆菌为研究对象,采用原子力显微镜(AFM)、接触角测量仪、扫描电子显微镜(SEM)和能谱仪(EDS)等试验方法,从微观形貌表征、热力学分析等方面,研究了HSn70-1AB铜合金表面生物膜的结构特性,并分析了生物膜疏水性能对生物膜结构的影响以及生物膜下HSn70-1AB铜合金的腐蚀机理.研究结果显示,HSn70-1AB合金表面生物膜的均匀性随浸泡对间的延长而逐渐变差;较强的亲本性使得后期生物膜的整体结构比较完整;弗氏柠檬酸杆菌对HSn70-1AB主要以局部腐蚀为主,尤其是点蚀.