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SRB生物膜与碳钢腐蚀的关系
引用本文:刘宏芳,许立铭,郑家遷. SRB生物膜与碳钢腐蚀的关系[J]. 中国腐蚀与防护学报, 2000, 20(1): 41-46
作者姓名:刘宏芳  许立铭  郑家遷
作者单位:华中理工大学化学系,武汉,430074
摘    要:利用间歇式方法培养硫酸盐还原菌(SRB)并制备SRB生物膜,研究表明,随着细菌的生长,细菌代产物改变了介质的PH,生物膜百度增加,膜中含菌量升高。在3%NaCl水溶液中,覆盖有不同生长期生物膜的碳钢试片的腐蚀速度有明显的差异;电子能谱对生物膜表面分析结果表明,不同生长期生物膜腐蚀产物的Fe/S比各不相同。为了验证生物膜中主要腐蚀因素,利用化学方法在试片表面沉积FeS膜,利用细菌滤膜隔离SRB,在度

关 键 词:硫酸盐还原菌 碳钢 生物膜 微生物腐蚀
文章编号:1005-4537(2000)01-0041-06

INFLUENCE OF SRB BIOFILM ON CORROSION OF CARBON STEEL
LIU Hong-fang,XU Li-ming,ZHENG Jia-shen. INFLUENCE OF SRB BIOFILM ON CORROSION OF CARBON STEEL[J]. Journal of Chinese Society For Corrosion and Protection, 2000, 20(1): 41-46
Authors:LIU Hong-fang  XU Li-ming  ZHENG Jia-shen
Abstract:The effects ofbiofilms of Sulfate Reducing Bacteria (SRB) on carbon steel have been studied. API RP-38media were used to culture SRB in batch and prepare SRB biofilms. The results show thatthe biofilms become thicker with the growth of SRB. Moreover, corrosion potential of theelectrode varies with time. While the pH of the media with SRB changes from 7.2 to 6.0,the count of SRB in biofilms increases. The corrosion rates of carbon steel couponscovered by biofilms with different growth periods in 3% NaCl Solution are remarkablydistinctive. EDXA results present that the components of corrosion products in biofilmswith different growth period are different. Furthermore, a FeS film was prepared usingchemosynthesis and a biofilm was prepared by biological method. The corrosion rates forthe three sorts of film were compared.The corrosion rates of coupons with SRB biofilms arelarger than these of coupons with the other two films. The corrosion mechanism is mainlyattributed to acid attack.
Keywords:SRB   SRB Biofilm   Corrosion   Carbon steel
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