温度对原油储罐罐底微生物腐蚀影响规律的研究  

Influence of Temperature on Microbial Induced Corrosion of Tank Bottom for Crude Oil Storage

作　　者：马凯军 王萌萌 史振龙 陈长风[2] 贾小兰[2] MA Kaijun;WANG Mengmeng;SHI Zhenlong;CHEN Changfeng;JIA Xiaolan(Eastern Oil Storage and Transportation Co.Ltd.,Pipe China Network Corporation,Xuzhou 221008,China;School of New Energy and Materials,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]国家管网集团东部储运公司,徐州221008 [2]中国石油大学(北京)新能源与材料学院,北京102249

出　　处：《中国腐蚀与防护学报》2022年第6期1051-1057,共7页Journal of Chinese Society For Corrosion and Protection

摘　　要：为探究温度对原油储罐罐底微生物腐蚀(均匀腐蚀和局部腐蚀)的影响规律与机理,采用16S rRNA基因测序分析微生物种群的特征,利用扫描电镜、激光共聚焦显微镜观察微生物膜的形态和点蚀坑特征。结果表明,罐底水微生物含有嗜温和嗜热的硫酸盐还原菌(SRB)和腐生菌(TGB),均匀腐蚀速率在65℃达到峰值,整体属于轻微腐蚀;点蚀速率在35℃达到峰值,达到0.8 mm/a,温度低于25℃及超过85℃后点蚀速率明显降低。温度对罐底板钢微生物腐蚀的影响与微生物种类耐温性有关,30~70℃间是点蚀敏感温度区间,点蚀坑与菌落的团簇生长有关,微生物首先在金属表面形成团簇状的菌落,然后代谢过程中菌落下的金属发生了快速腐蚀。The influence of temperature on the microbial induced corrosion(uniform corrosion rate and local corrosion rate) of the tank bottom for crude oil storage was assessed by means of 16S rRNA gene sequencing, as well as scanning electron microscope and laser confocal microscope in terms of the characteristics of microbial populations, and the morphology of the microbial film, and the characteristics of pitting. The results showed that the water microorganisms on the tank bottom composed of mesophilic and thermophilic sulfate-reducing bacteria(SRB), and saprophytic bacteria(TGB). The uniform corrosion rate of the Q235A steel plate reached a peak at 65 ℃, however, the overall corrosion rate was slight. The pitting corrosion rate peaked at 35 ℃, reaching 0.8 mm/a, and the pitting corrosion rate decreased significantly at temperatures below 25 ℃ and over 85 ℃. The influence of temperature on the microbial induced corrosion of the Q235A steel plate of tank floor is related to the temperature tolerance of microbial species. The temperature range between 30 and 70 ℃ is the sensitive temperature range of pitting corrosion. The emerge of corrosion pits are related to the growth of colony clusters, while microbes first form clusters on the metal surface. Therefore,during the process of metabolism, the metal beneath the colonies was rapidly corroded.

关 键 词：罐底板腐蚀 微生物腐蚀 点蚀坑 硫酸盐还原菌 腐生菌 耐温性 

分 类 号：TG174[金属学及工艺—金属表面处理]