丙烯腈装置中反应气体冷却器用热电偶套管的泄漏原因
Leakage Reason of Thermocouple Bushing in Reactive Gas Cooler in Acrylonitrile Plant
摘 要
某丙烯腈装置反应气体冷却器热电偶套管在使用过程中发生泄漏。采用宏观观察、化学成分分析、显微组织观察、显微硬度测试、扫描电镜和能谱分析等方法,分析了该热电偶套管泄漏的原因。结果表明:该热电偶套管的开裂形式为应力腐蚀开裂,其泄漏的主要原因是套管热影响区和母材区的表面状态和显微组织差异产生应力,在硫化氢和氯化物共存的环境中,在热影响区优先形成应力腐蚀裂纹,裂纹沿着晶界向母材扩展,从而在套管与法兰凸台的焊缝连接处发生开裂,最终导致热电偶套管在使用过程中发生泄漏。
热电偶套管
应力腐蚀开裂
316L不锈钢
acrylonitrile plant
thermocouple bushing
stress corrosion cracking
316L stainless steel
Abstract
The thermocouple bushing of reaction gas cooler in an acrylonitrile plant leaked during use. The causes of the leakage were analyzed by means of macroscopic observation, chemical composition analysis, microstructure observation, microhardness test, scanning electron microscopy and energy dispersive spectroscopy. The results showed that the cracking mode of the thermocouple bushing was stress corrosion cracking. The main reason of its leakage was the difference of surface state and microstructure between heat affected zone and base metal zone of thermocouple bushing produced stress, which led to the formation of stress corrosion cracks in the heat affected zone preferent ially. In the environment where hydrogen sulfide and chloride coexisted. The cracks propagated along the grain boundary to the base metal, which led to cracking at the weld joint between the thermocouple bushing and the flange boss, and finally led to the leakage of thethermocouple bushing during use.
中图分类号 TG174 DOI 10.11973/fsyfh-202212005
所属栏目 腐蚀电化学基础、技术与运用
基金项目 浙江省基础公益研究计划(LGC22B050013);浙江大学实验技术研究项目(SJS202008);浙江大学衢州研究院科技计划(IZQ2020KJ2013)
收稿日期 2022/8/9
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网络出版日期
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引用该论文: LI Jing,LIU Wenjuan,SHI Hongqi. Leakage Reason of Thermocouple Bushing in Reactive Gas Cooler in Acrylonitrile Plant[J]. Corrosion & Protection, 2022, 43(12): 30
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参考文献
【1】王立坤,陈海,魏培生,等. 不锈钢换热管的失效分析[J]. 腐蚀与防护,2020,41(10):74-78.
【2】陈维,侯成宝,武法光. 丙烯腈生产中浮头式换热器螺栓断裂失效分析[J]. 腐蚀与防护,2020,41(8):74-78.
【3】魏薇,黄国根,章芳芳. 高压换热器TP347焊缝开裂失效分析[J]. 热加工工艺,2020,49(17):159-162.
【4】王德州,刘增温,杨建杰. 换热器氯离子应力腐蚀开裂调查防护研究[J]. 煤炭与化工,2021,44(5):136-137,160.
【5】白冬军,杨良仲,彭晶凯,等. 不锈钢板式换热器腐蚀破坏原因分析[J]. 区域供热,2020(3):19-32.
【6】牛晓娟,潘线伟,李天罡. 高效换热器换热管失效的原因及对策分析[J]. 当代化工研究,2021(9):21-22.
【7】马殿国,郝凤丹,陈立志. 换热器管束开裂失效分析[J]. 中国化工装备,2021,23(3):33-36.
【8】沈溃领, 蒋文春, 苏厚德, 等. 接头形式对换热器管板接头焊接残余应力的影响[J]. 热加工工艺, 2022, 51(21):106-110.
【9】POLO J L,CANO E,BASTIDAS J M. An impedance study on the influence of molybdenum in stainless steel pitting corrosion[J]. Journal of Electroanalytical Chemistry,2002,537(1/2):183-187.
【10】DAVOODI A,PAKSHIR M,BABAIEE M,et al. A comparative H2S corrosion study of 304L and 316L stainless steels in acidic media[J]. Corrosion Science,2011,53(1):399-408.
【11】JIN Z H,GE H H,LIN W W,et al. Corrosion behaviour of 316L stainless steel and anti-corrosion materials in a high acidified chloride solution[J]. Applied Surface Science,2014,322:47-56.
【12】刘相臣,张秉淑. 石油和化工装备事故分析与预防(第3版)[M]. 北京:化学工业出版社,2011.
【13】厉建文,吴东山. 半再生重整装置二段混氢换热器膨胀节失效分析及改造[J]. 石油化工设备,2007,36(6):96-98.
【14】孙成志,屈丹,李鹏. 丙烯腈装置E-8102反应气体冷却器泄露原因分析与设计改进[J]. 中国石油和化工标准与质量,2012,32(8):24-25.
【15】HE W,KNUDSEN O Ø,DIPLAS S. Corrosion of stainless steel 316L in simulated formation water environment with CO2-H2S-Cl-[J]. Corrosion Science,2009,51(12):2811-2819.
【16】HINDS G,WICKSTRÖM L,MINGARD K,et al. Impact of surface condition on sulphide stress corrosion cracking of 316L stainless steel[J]. Corrosion Science,2013,71:43-52.
【17】肖辉宗,谢飞,吴明,等. X80管线钢在CO32-、HCO3-及Cl-协同作用下的腐蚀行为[J]. 材料保护,2017,50(8):14-17.
【18】ZHANG X C, CHEN H, Zhang T, et al. Cause analysis of leakage in 316L stainless steel heat exchanger[C]//2020 IOP Conference Series-Earth and Environmental Science.[S.l.]:IOP Publishing,2020.
【19】REN Z,ERNST F. Stress-corrosion cracking of AISI 316L stainless steel in seawater environments:effect of surface machining[J]. Metals, 2020, 10(10):1324.
【20】RAO M A,BABU R S,PAVAN KUMAR M V. Stress corrosion cracking failure of a SS 316L high pressure heater tube[J]. Engineering Failure Analysis,2018,90:14-22.
【21】钟振前,田志凌,唐树平. 316L奥氏体不锈钢应力腐蚀裂纹的形成机制[J]. 材料热处理学报,2015,36(11):144-149.
【22】KONG D C,DONG C F,NI X Q,et al. Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes[J]. Journal of Materials Science & Technology,2019,35(7):1499-1507.
【23】CHANG L T,MUKAHIWA K,DUFF J,et al. The effect of low temperature heat treatment on stress corrosion crack initiation in machined 316L stainless steel in high-temperature hydrogenated water[J]. Scripta Materialia,2021,195:113742.
【24】陈孙艺,刘恒. 特殊性能热电偶套管的技术对策[J]. 广东科技,2012,21(9):198-200.
【2】陈维,侯成宝,武法光. 丙烯腈生产中浮头式换热器螺栓断裂失效分析[J]. 腐蚀与防护,2020,41(8):74-78.
【3】魏薇,黄国根,章芳芳. 高压换热器TP347焊缝开裂失效分析[J]. 热加工工艺,2020,49(17):159-162.
【4】王德州,刘增温,杨建杰. 换热器氯离子应力腐蚀开裂调查防护研究[J]. 煤炭与化工,2021,44(5):136-137,160.
【5】白冬军,杨良仲,彭晶凯,等. 不锈钢板式换热器腐蚀破坏原因分析[J]. 区域供热,2020(3):19-32.
【6】牛晓娟,潘线伟,李天罡. 高效换热器换热管失效的原因及对策分析[J]. 当代化工研究,2021(9):21-22.
【7】马殿国,郝凤丹,陈立志. 换热器管束开裂失效分析[J]. 中国化工装备,2021,23(3):33-36.
【8】沈溃领, 蒋文春, 苏厚德, 等. 接头形式对换热器管板接头焊接残余应力的影响[J]. 热加工工艺, 2022, 51(21):106-110.
【9】POLO J L,CANO E,BASTIDAS J M. An impedance study on the influence of molybdenum in stainless steel pitting corrosion[J]. Journal of Electroanalytical Chemistry,2002,537(1/2):183-187.
【10】DAVOODI A,PAKSHIR M,BABAIEE M,et al. A comparative H2S corrosion study of 304L and 316L stainless steels in acidic media[J]. Corrosion Science,2011,53(1):399-408.
【11】JIN Z H,GE H H,LIN W W,et al. Corrosion behaviour of 316L stainless steel and anti-corrosion materials in a high acidified chloride solution[J]. Applied Surface Science,2014,322:47-56.
【12】刘相臣,张秉淑. 石油和化工装备事故分析与预防(第3版)[M]. 北京:化学工业出版社,2011.
【13】厉建文,吴东山. 半再生重整装置二段混氢换热器膨胀节失效分析及改造[J]. 石油化工设备,2007,36(6):96-98.
【14】孙成志,屈丹,李鹏. 丙烯腈装置E-8102反应气体冷却器泄露原因分析与设计改进[J]. 中国石油和化工标准与质量,2012,32(8):24-25.
【15】HE W,KNUDSEN O Ø,DIPLAS S. Corrosion of stainless steel 316L in simulated formation water environment with CO2-H2S-Cl-[J]. Corrosion Science,2009,51(12):2811-2819.
【16】HINDS G,WICKSTRÖM L,MINGARD K,et al. Impact of surface condition on sulphide stress corrosion cracking of 316L stainless steel[J]. Corrosion Science,2013,71:43-52.
【17】肖辉宗,谢飞,吴明,等. X80管线钢在CO32-、HCO3-及Cl-协同作用下的腐蚀行为[J]. 材料保护,2017,50(8):14-17.
【18】ZHANG X C, CHEN H, Zhang T, et al. Cause analysis of leakage in 316L stainless steel heat exchanger[C]//2020 IOP Conference Series-Earth and Environmental Science.[S.l.]:IOP Publishing,2020.
【19】REN Z,ERNST F. Stress-corrosion cracking of AISI 316L stainless steel in seawater environments:effect of surface machining[J]. Metals, 2020, 10(10):1324.
【20】RAO M A,BABU R S,PAVAN KUMAR M V. Stress corrosion cracking failure of a SS 316L high pressure heater tube[J]. Engineering Failure Analysis,2018,90:14-22.
【21】钟振前,田志凌,唐树平. 316L奥氏体不锈钢应力腐蚀裂纹的形成机制[J]. 材料热处理学报,2015,36(11):144-149.
【22】KONG D C,DONG C F,NI X Q,et al. Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes[J]. Journal of Materials Science & Technology,2019,35(7):1499-1507.
【23】CHANG L T,MUKAHIWA K,DUFF J,et al. The effect of low temperature heat treatment on stress corrosion crack initiation in machined 316L stainless steel in high-temperature hydrogenated water[J]. Scripta Materialia,2021,195:113742.
【24】陈孙艺,刘恒. 特殊性能热电偶套管的技术对策[J]. 广东科技,2012,21(9):198-200.
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