集输管线硫酸盐还原菌诱导生物矿化作用调查  

Investigation of Biomineralization Induced by Sulfate Reducing Bacteria in Sewage Gathering Pipelines in Oilfield

作　　者：刘宏伟[1] 刘宏芳[1] 秦双[1] 韩霞[2] 王田丽[2] 

机构地区：[1]华中科技大学化学与化工学院材料化学与服役失效湖北省重点实验室,武汉430074 [2]中国石化石油工程设计有限公司,东营257026

出　　处：《腐蚀科学与防护技术》2015年第1期7-12,共6页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(51171067);深圳市基础研发基金项目(JC201005310696A)资助

摘　　要：利用扫描电镜(SEM)、能谱、X射线衍射仪(XRD)和超景深三维立体显微镜等表面分析手段,调查研究油田污水集输管线材料的腐蚀和结垢行为。实验结果表明,暴露在没有添加杀菌剂的污水中30 d的试样表面形成了大量的垢状沉淀物,局部放大可以发现以胞外聚合物为主的生物膜覆盖在试样表面,此时生物膜的厚度高达169.6μm,生物膜中含碳酸盐垢和细菌代谢产物硫铁化合物,且膜下基体材料局部腐蚀孔深度达到23.96μm。在连续添加100 mg/L有机胍类杀菌剂1个月后,试样表面覆盖物中以无机矿物为主,且膜层厚度较未添加的薄,厚度为48.6μm,膜下腐蚀较均匀,局部腐蚀轻微。硫酸盐还原菌参与的生物作用是管线局部腐蚀穿孔的主要原因之一。The situatuion concering corrosion and scaling of the inner wall of sewage gathering pipelines in oil field was investigated by means of scanning electron microscopy(SEM) with energy dispersive X-ray spectrometry(EDS), X-ray diffracmeter(XRD) and three-dimensional stereoscopic microscopy. The results indicated that after exposure to the sewage for 30 d a scale of deposits ca 169.6 μm in thickness could be observed on the surface of test samples, which consisted maily of extracellular polymeric substance with iron sulfides, the product of sulfate reducing bacteria metabolism, while beneath the scale the pipeline steel suffered from pitting corrosion with a maximum pit depth 23.96 μm; however after exposure for the same period in the same medium but with continuously adding organic guanidine bactericide of a dose 100 mg/L, the thickness of corrosion products scale was lowed to only ca 48.6 μm, besides, the corrosion of the substrate beneath the scale was light. It may be concluded that one of the reasons responsible to the localized perforation of pipelines was the SRB induced corrosion.

关 键 词：硫酸盐还原菌 生物矿化 胞外聚合物 生物膜 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]