| 制氢装置6E-4换热器管束腐蚀原因分析 |
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| 引用本文： | 向长军,穆澎淘,易强.制氢装置6E-4换热器管束腐蚀原因分析[J].腐蚀与防护,2010(10). |
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| 作者姓名： | 向长军 穆澎淘 易强 |
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| 作者单位： | 中国石油克拉玛依石化分公司; |
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| 摘 要： | 介绍了某石化公司制氢装置低变气换热器6E-4管束泄漏失效情况,通过分析确定管束泄漏是由于0Cr18Ni10Ti不锈钢的应力腐蚀破裂造成的。原因是壳程冷却水含氯离子,管束过热导致结垢严重,垢下腐蚀部位形成应力腐蚀裂纹源,垢下氯离子富集加速了换热管的应力腐蚀开裂。通过材质升级、水质控制和工艺技术改造等措施,确保了该换热器的长周期运行。
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| 关 键 词： | 换热器 应力腐蚀 氯离子 奥氏体不锈钢 |
Corrosion Reason Analysis of 6E-4 Tube Bundle Heat Exchanger in Hydrogen Manufacturing Plant |
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| XIANG Chang-jun,MU Peng-tao,YI-Qiang.Corrosion Reason Analysis of 6E-4 Tube Bundle Heat Exchanger in Hydrogen Manufacturing Plant[J].Corrosion & Protection,2010(10). |
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| Authors: | XIANG Chang-jun MU Peng-tao YI-Qiang |
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| Affiliation: | XIANG Chang-jun,MU Peng-tao,YI-Qiang(PetroChina Karamay Petrochemical Company,Keramay 834003,China) |
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| Abstract: | The reason of leakage of low-pressure-convert-gas heat exchanger 6E-4 tube bundle in a hydrogen manufacturing plant of a petrochemical company.The results indicated that the essential leakage reason of 6E-4 tube bundle was the stress-corrosion of 0Cr18Ni10Ti austenite stainless steel resulted from Cl-contained in the shell-side cooling water.In addition,the temperature of the cooling water surpassed the normal temperature,resulting in severe scalling.The crack sources were formed from the region of under-sc... |
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| Keywords: | heat exchanger stress-corrosion Cl- austenite stainless steel |
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