从中原油田污水中分离提纯出硫酸盐还原菌(SRB)菌株，采 用API RP-38推荐使用的培养基在铜材料上形成生物膜.结果表明，随着细菌的生长，细菌的 代谢产物改变了黄铜的电极电位.用电子探针( EPMA)、X射线衍射(XRD)对生物膜形貌和成分 进行了分析.生物膜中腐蚀产物成分主要有硫化亚铜(Cu2S)等硫化物，用交流阻抗(EIS)技 术对生物膜结构进行了分析.
In this paper，the biofilm of sulfate-reducing bact eria (SRB) which plays an important role in corrosion of 70/30 Cu-Zn alloy under anaerobic condition has been studied.The API medium was used to culture the SR B in Zhongyuan oilfield.Potential/time measurement showed that the presence of SRB makes the corrosion protential more active with SRB growth metabolite.Elect rochemical impedance spectroscopy (EIS) was used to analyse the electrode proces s of 70/30 Cu-Zn alloy with SRB biofilm.X-ray diffraction and EPMA were used to analyse the corrosion products.The results show that the variation of activity of the SRB biofilm with SRB growth can be found from the EIS in inoculated medi a.The crystal of sub-copper sulfide (Cu2S) exists in the SRB biofilm.
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