中华医学超声杂志

应用化学 ›› 2012, Vol. 29 ›› Issue (01): 100-105.DOI: 10.3724/SP.J.1095.2011.00037

• 研究论文 • 上一篇    下一篇

硫化锰夹杂溶解和微生物存在对不锈钢管发生点蚀

姬鄂豫1*,陈海玲1,李长鸣2   

  1. (1.南阳理工学院 南阳  473004；2.河南电力试验研究院 郑州 450007)
  • 收稿日期:2011-01-20 修回日期:2011-06-08 出版日期:2012-01-10 发布日期:2012-01-10
  • 通讯作者: 姬鄂豫,副教授; Tel:0377-62076348; Fax:0377-62076380; E-mail:yangyuyang369@126.com; 研究方向：金属腐蚀与电化学分析
  • 基金资助:
    河南省科技厅项目（0524270015）

Pitting Corrosion of Stainless Steel Pipes via MnS Dissolution and Microbial Corrosion

JI Eyu1*, CHEN Hailing1, LI Changming2   

  1. (1.Nanyang Institute of Technology,Nanyang 473004,China;
    2.Henan Electric Power Test Research Institute,Zhengzhou 450007,China)
  • Received:2011-01-20 Revised:2011-06-08 Published:2012-01-10 Online:2012-01-10

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摘要：

结合发电厂凝汽器不锈钢管内壁腐蚀部位分布规律和腐蚀外貌特征，分别对腐蚀部位沉积物、内壁蚀孔附近管材成分进行扫描电子显微镜观察和能谱分析，探讨了管材中MnS溶解与微生物对凝汽器不锈钢管腐蚀的电化学反应机理，发现二者在点蚀形成过程中具有协同作用，并在综合分析影响不锈钢腐蚀的各种因素的基础上，提出了不锈钢凝汽器在运行过程中应采取的防护措施。

关键词: 凝汽器, 不锈钢管, 管材缺陷, 微生物腐蚀, 协同作用

Abstract:

The microstructure and composition of the stainless steel water tubes used for the condensers in power plants and the deposits near the corrosion holes were analyzed by SEM and EDS respectively. The electrochemical reaction mechanism of MnS dissolution and microbial corrosion were explored, and a synergistic effect of both corrosions was found in the process of pitting corrosion. Based on the comprehensive analysis of various factors affecting the stainlesssteel′s corrosion, some preventive measures are put forward to help the stainless steel condensers function smoothly.

Key words: condenser, stainless steel pipe, tubing defects, microbial corrosion, synergy

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