| 孙芳萍,张盈盈,张志浩,张彦军.某油气集输管线腐蚀失效分析[J].装备环境工程,2018,15(8):26-32. SUN Fang-ping,ZHANG Ying-ying,ZHANG Zhi-hao,ZHANG Yan-ju.Corrosion Failure Analysis of an Oil and Gas Gathering Pipeline[J].Equipment Environmental Engineering,2018,15(8):26-32. |
| 某油气集输管线腐蚀失效分析 |
| Corrosion Failure Analysis of an Oil and Gas Gathering Pipeline |
| 投稿时间：2018-04-02 修订日期：2018-08-25 |
| DOI：10.7643/ issn.1672-9242.2018.08.005 |
| 中文关键词: 腐蚀 管道失效评价 管材检测 介质分析 产物检测 闭塞腐蚀 |
| 英文关键词:corrosion evaluation of pipeline failure pipe material detection medium analysis product detection occluded corrosion |
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| Author | Institution |
| SUN Fang-ping | 1. Xi'an Changqing Technology Engineering Co., Ltd., Xian 710018, China |
| ZHANG Ying-ying | 2. CNPC Research Institute of Engineering Technology, Tianjin 300451, China; 3. Key Laboratory of Tubular Goods Engineering, CNPC, Research Division of Corrosion Coating and Thermal Insulation Structure, Tianjin 300451, China |
| ZHANG Zhi-hao | 1. Xi'an Changqing Technology Engineering Co., Ltd., Xian 710018, China |
| ZHANG Yan-ju | 2. CNPC Research Institute of Engineering Technology, Tianjin 300451, China; 3. Key Laboratory of Tubular Goods Engineering, CNPC, Research Division of Corrosion Coating and Thermal Insulation Structure, Tianjin 300451, China |
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| 中文摘要: |
| 目的 掌握管道腐蚀机理，有针对性地提出防腐方案。方法 现场进行腐蚀管段截取和介质取样，采用腐蚀失效管段管材分析、腐蚀介质成分分析和腐蚀产物分析的试验方法，室内开展管道腐蚀失效原因检测和分析。结果 失效管段内表面存在不均匀的沉积物，且部分位置发生了剥离脱落，存在裂缝。管道管材性能满足20#钢的性能指标要求。输送介质矿化度高，Cl和SO42含量高。腐蚀产物主要成分是几种Fe的氧化物和氢氧化物，如Fe(OH)2、Fe2O3和FeO(OH)等，也含有部分氯化物和硫化物。结论 管道在介质中主要腐蚀类型为腐蚀产物引起的闭塞腐蚀，介质内含有H2S，在含水条件下管道发生了O2和H2S腐蚀，最终使管壁减薄失效。 |
| 英文摘要: |
| Objective To master the mechanism of pipeline corrosion and put forward a pertinent anticorrosion scheme. Methods The corrosion pipe section and medium sampling were carried out on the spot, pipe section analysis､corrosion medium composition analysis and corrosion product analysis were adopted to test and analyze causes of pipeline corrosion failure in the room. Results There were uneven sediments on the inner surface of the failure pipe, and some parts were stripped off and there were cracks. The performance of the pipe met the requirement of the performance index of 20# steel. The conveying medium had high salinity and high content of Cl and SO42. The main components of corrosion products were oxides and hydroxides of several Fe, such as Fe (OH)2, Fe2O3 and FeO(OH), and also some chloride and sulfide. Conclusion The main corrosion type of pipeline in the medium is the occluded corrosion caused by corrosion products. The medium contains H2S. O2 and H2S corrosion occur in the pipe under water bearing conditions and eventually lead to thinning and failure of pipeline. |
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