胥聪敏,张耀亨,程光旭,朱文胜

• 1:西安交通大学能源与动力工程学院
• 2:西安交通大学能源与动力工程学院
• 3:西安交通大学能源与动力工程学院
• 4:兰州石化炼油厂技术中心 陕西西安710049

摘要(Abstract)：

采用微生物分析、电化学测试、扫描电镜观察及表面能谱分析等方法,研究了316L不锈钢在硫酸盐还原菌(Sulfate-Reducing Bacteria,SRB)与铁氧化菌(Iron-Oxidizing Bacteria,IOB)共同作用的溶液中的腐蚀电化学行为,分析了炼油厂冷却水系统中微生物腐蚀的特征及机制。结果表明,不锈钢电极在SRB与IOB相结合的溶液中的自腐蚀电位、点蚀电位和再钝化电位均随浸泡时间的增加而负移,其滞后环增大;在SRB与IOB共同作用的溶液中的腐蚀速率大于在无菌溶液中;显微观察表明生物膜疏松多孔,生物膜内细菌的生长代谢活动促使不锈钢表面的钝化膜层腐蚀破坏程度增加,在SRB与IOB共同作用下316L不锈钢电极发生了严重的点蚀。

关键词(KeyWords)： 硫酸盐还原菌;铁氧化菌;316L不锈钢;生物膜;钝化膜;点蚀

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助(20576108)

作者(Author): 胥聪敏,张耀亨,程光旭,朱文胜

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