高压加氢换热器Ω环开裂失效分析

中国腐蚀与防护学报, 2010, 30(5): 413-415.

高压加氢换热器Ω环开裂失效分析

丁毅 , 赵骏 , 师红旗 , 马立群

1.1. 南京工业大学材料科学与工程学院南京 2100092. 攀钢研究院攀枝花 617000>

1.1. School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 2100092. Panzhihua Iron &

Steel Research Institute, Pan Zhihua 617000>

关键词：换热器 , Ω loop , hydrogen sulfide , stress corrosion cracking

A FAILURE ANALYSIS ON CRACKING OFΩ LOOP OF HIGH PRESSURE HYDROGENATION HEAT EXCHANGER

DING Yi , ZHAO Jun , SHI Hongqi , MA Liqun

Keywords： heat exchanger , Ω环 , H₂S , 应力腐蚀开裂

用扫描电镜（SEM）及能谱(EDS)分析等手段，分析加氢高压换热器Ω环开裂原因。结果表明，Ω环的开裂属于H₂S应力腐蚀开裂，高的工作应力和壳程少量硫化氢的存在共同促使其开裂。

Cracking of Ω loop of high pressure hydrogenation heat exchanger was analyzed by means of morphology and microstructure analysis, chemical composition analysis, SEM micro-morphology analysis and EDS analysis. The results showed that the cracking of the sample was to be hydrogen sulfide stress corrosion cracking. The high working stress and a few of hydrogen sulfide in shell side induced the cracking of the Ω loop jointly.

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