管材缺陷与微生物对凝汽器不锈钢管的协同腐蚀作用
Synergistic Effect of Tubing Defects and Microbes on Corrosion of Stainless Steel Pipes in Condenser
摘 要
结合某发电厂凝汽器不锈钢管水侧腐蚀部位分布规律和腐蚀形貌特征, 分别对腐蚀部位沉积物、内壁蚀孔附近管材进行化学成分、电镜和能谱分析, 探讨了管材缺陷与微生物对凝汽器不锈钢管腐蚀的影响。结果表明, 两者在点蚀形成过程中具有协同作用。提出了不锈钢凝汽器在运行过程中应采取的防护措施。
不锈钢管
管材缺陷
微生物腐蚀
协同作用
condenser
stainless steel pipe
tubing defect
microbial corrosion
synergy
Abstract
Combining the distribution regularity and morphological features of waterside corrosion parts on stainless steel tubes of the condenser in a power plant, the sediments on the corrosion parts and tubing components near corrosion holes of inwall were analyzed by chemical analysis, SEM and EDS. The results showed that tubing defects and microbes had synergistic effect on the formation of pitting corrosion. Some preventive measures were proposed to ensure the stainless steel condenser running stably.
中图分类号 TG172
所属栏目 应用技术
基金项目 河南省科技厅项目(0524270015)
收稿日期 2011/1/19
修改稿日期 2011/3/6
网络出版日期
作者单位点击查看
备注姬鄂豫, 副教授,
引用该论文: JI E-yu,CHEN Hai-ling,YAO Jie-xin,WANG Ling. Synergistic Effect of Tubing Defects and Microbes on Corrosion of Stainless Steel Pipes in Condenser[J]. Corrosion & Protection, 2011, 32(9): 731
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参考文献
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【2】周本省. 工业水处理技术研究[M]. 北京:化学工业出版社, 1997.
【3】张翠荣, 贾振宇. 腐植酸在水产养殖中应用[J]. 广州化工, 2004, 32(1): 14-17.
【4】Zheng S J, Wang Y J, Zhang B, et al. Identification of MnCr2O4 nano-octahedron in catalysing pitting corrosion of austenitic stainless steels[J]. Acta Materialia, 2010, 58: 5070-5085.
【5】刘正生译. 硫化锰与锈蚀开始的关系[J]. 钢铁研究情报, 1975(2):25-30.
【6】Dieter D, Werner S. Is dissolved Mn2+ being oxidized by O2 in absence of Mn-bacteria or surface catalysts?[J]. Geochim Cosmochim Ac, 1984, 48(7):1571-1573.
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