| 某304不锈钢管道泄漏的失效分析 |
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| 引用本文： | 蒋志国,王辉煌,龚利华.某304不锈钢管道泄漏的失效分析[J].腐蚀与防护,2017,38(2). |
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| 作者姓名： | 蒋志国 王辉煌 龚利华 |
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| 作者单位： | 1. 江苏省特种设备安全监督检验研究院常熟分院,常熟,215550;2. 江苏科技大学材料科学与工程学院,镇江,212003 |
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| 摘 要： | 某氟化工企业304不锈钢管道在运行三年半后发生泄漏失效。通过直读光谱仪、光学显微镜、扫描电镜和X射线衍射仪等对失效部位材料的化学成分、显微组织、腐蚀形貌及腐蚀产物进行了分析。结果表明:该304不锈钢管道的失效主要为Cl-浓缩造成的点蚀穿孔,H_2S的存在则对点蚀起到了促进作用。
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| 关 键 词： | 不锈钢 失效分析 点蚀 H2S |
Analysis of Leakage Failure of a Type 304 Stainless Steel Tube |
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| JIANG Zhi-guo,WANG Hui-huang,GONG Li-hua.Analysis of Leakage Failure of a Type 304 Stainless Steel Tube[J].Corrosion & Protection,2017,38(2). |
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| Authors: | JIANG Zhi-guo WANG Hui-huang GONG Li-hua |
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| Abstract: | Leakage failure occurred at a 304 stainless steel tube after working for three and a half years in a fluorine chemical enterprise.The chemical composition,microstructure,corrosion morphology and corrosion products of the material in failed part of 304 stainless steel tube were studied using direct reading spectrometry,optical microscopy,scanning electron microscopy and X-ray diffraction.The results show that the major failure mode was pitting corrosion and perforation due to local enrichment of Cl-in the tube,and the existence of H2S promoted pitting corrosion. |
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| Keywords: | stainless steel failure analysis pitting corrosion H2S |
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