加氢装置循环氢水冷器管束泄漏原因分析
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摘要
某石化公司柴油加氢装置循环氢水冷器管束多次发生腐蚀泄漏。通过对腐蚀失效管束的腐蚀形貌、材质、垢物成分等结果进行综合分析显示,造成水冷器管束严重腐蚀的主要原因为Cl-局部富集所造成的点蚀引起的,介质的冲刷作用加剧了腐蚀,本文对此提出了腐蚀控制的建议措施。
Corrosion failure analysis of water cooler tube bundle of a hydrotreater was performed with physical and chemical analysis. The results showed that the leakage of the tube bundle was caused by pitting corrosion, where local enrichment of chloride ions emerged, while the erosion of the medium aggravates the corrosion. At the last, several corrosion control measures are proposed in this paper.
Corrosion failure analysis of water cooler tube bundle of a hydrotreater was performed with physical and chemical analysis. The results showed that the leakage of the tube bundle was caused by pitting corrosion, where local enrichment of chloride ions emerged, while the erosion of the medium aggravates the corrosion. At the last, several corrosion control measures are proposed in this paper.
引文
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[11]Ding Y G,Wang H L,Guo X P,et al.Erosion-corrosion of metals in liquid-solid two-phase flow[J].Mater.Prot.,2001,34(11):16(丁一刚,王慧龙,郭兴蓬等.金属在液固两相流中的冲刷腐蚀[J].材料保护,2001,34(11):16)
[12]Gao W F.Effects of pearlite spheroidization in 15CrMo steel on the mechanical properties[J].J.Petrochem.Univ.,1997,10(4):41(高万夫.15CrMo钢珠光体球化对机械性能的影响[J].石油化工高等学校学报,1997,10(4):41)
[13]Stack M M,Abdelrahman S M.A CFD model of particle concen‐tration effects on erosion-corrosion of Fe in aqueous conditions[J].Wear,2011,273(1):38
[2]Nishimura T,Katayama H,Noda K.Electrochemical behavior of rust formed on carbon steel in a wet/dry environment containing chloride ions[J].Corrosion,2000,56(9):935
[3]Chen X Q,Kong X D,Yang S C.Mechanism of pitting initiated by the sulfide inclusion in carbon steel[J].J.Nav.Aca.Eng.,1997,1:1(陈学群,孔小东,杨思诚.低碳钢中硫化物夹杂物诱发点蚀的机理[J].海军工程学院学报,1997,1:1)
[4]Srivastava S C,Ives M B.Dissolutions of inclusions in low alloy steel exposed to chloride containing environments[J].Corrosion,1987,43(11):687
[5]Chen B,Fan Y G,Zhou S P.Corrosion failure analysis of heat ex‐change tubes water coolers[J].Corros.Sci.Prot.Technol.,2010,22:547(陈兵,樊玉光,周三平.水冷器腐蚀失效原因分析[J].腐蚀科学与防护技术,2010,22:547)
[6]Ma H J.Analysis on corrosion induced leakage of low oil heat ex‐changer in diesel hydrogenation unit[J].Corros.Sci.Prot.Technol.,2017,29:687(马红杰.柴油加氢装置低分油换热器腐蚀泄漏分析[J].腐蚀科学与防护技术,2017,29:687)
[7]Wang W.Cause analysis and solution of the leaking problem of the water cooler in the oil refinery[J].Petro-Chem.Equip.Technol.,2012,33:46(王巍.炼油厂水冷器泄漏原因分析及解决办法[J].石油化工设备技术,2012,33:46)
[8]Zhou B S.Scaling in the recirculating cooling water systems[J].Chem.Clean.,1999,15(3):36(周本省.循环冷却水系统中的结垢问题[J].化学清洗,1999,15(3):36)
[9]Zhang Y.Application analysis on special coatings applied to nu‐clear power plan[J].Electro.Finsh.,2008,27:57(张耀.核电专用涂层应用分析[J].电镀与涂饰,2008,27:57)
[10]Liu R,Yao M X,Patnaik P C,et al.An improved wear-resistant PTA hardfacing:VWC/stellite[J].J.Compos.Mater.,2006,40(24):2203
[11]Ding Y G,Wang H L,Guo X P,et al.Erosion-corrosion of metals in liquid-solid two-phase flow[J].Mater.Prot.,2001,34(11):16(丁一刚,王慧龙,郭兴蓬等.金属在液固两相流中的冲刷腐蚀[J].材料保护,2001,34(11):16)
[12]Gao W F.Effects of pearlite spheroidization in 15CrMo steel on the mechanical properties[J].J.Petrochem.Univ.,1997,10(4):41(高万夫.15CrMo钢珠光体球化对机械性能的影响[J].石油化工高等学校学报,1997,10(4):41)
[13]Stack M M,Abdelrahman S M.A CFD model of particle concen‐tration effects on erosion-corrosion of Fe in aqueous conditions[J].Wear,2011,273(1):38