辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2012, Vol. 32 ›› Issue (3): 54-57.

• 化工机械 • 上一篇    下一篇

换热器管束腐蚀穿孔失效原因分析

李俊俊刘 峰   

  1. 辽宁石油化工大学机械工程学院,辽宁抚顺113001
  • 收稿日期:2012-03-07 出版日期:2012-09-20 发布日期:2017-07-06
  • 作者简介:李俊俊(1984-),女,河南开封市,在读硕士

Failure Analysis on Corrosion Failure of Heat Exchanger and Proposal

LI Jun-jun, LIU Feng   

  1. School of Mechanical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, P.R.China
  • Received:2012-03-07 Published:2012-09-20 Online:2017-07-06

摘要:      采用光学显微镜、X射线荧光光谱仪、X射线衍射仪(XRD)、电化学测试等分析手段,对某洗化厂循环水换热器管束钢(20# 钢)进行失效分析。分析结果表明:管束材质成分不符合标准20# 钢成分的要求,管束材质的变化将影响其耐蚀性;又由于管束内表面结垢发生较为严重的垢下腐蚀,管束内表面存在氧化铁垢层使垢层内外形成氧浓差电池,构成大阴极小阳极腐蚀原电池。所以,垢下腐蚀是引起管束穿孔的主要原因。

关键词:  换热器 ,  穿孔 ,  腐蚀 ,  失效

Abstract: Failure of heat exchanger at a wash of circulating water factory was analyzed by optical microscope, X-ray fluorescence spectrometer, X-ray diffraction (XRD), electrochemical test analysis method. The results show that chemical composition of heat exchanger didn’t meet the standard of 20# steel. Due to the surface of the vascular bundles scaling there is a serious corrosion. inside surface of tubes exist iron oxide layer which led to the under-deposition corrosion because different concentration of oxygen inside and outside deposition form corrosion battery. Therefore, under-deposit corrosion is the main the main cause of tubes perforation.

Key words:  Heat exchanger ,  Perforation , Corrosion , Failure

引用本文

李俊俊,刘 峰. 换热器管束腐蚀穿孔失效原因分析[J]. 辽宁石油化工大学学报, 2012, 32(3): 54-57.

LI Jun-jun, LIU Feng. Failure Analysis on Corrosion Failure of Heat Exchanger and Proposal[J]. Journal of Liaoning Petrochemical University, 2012, 32(3): 54-57.

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