| 大口径输油管道腐蚀及防腐层失效分析 |
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| 引用本文： | 梁亚宁,孟庆武,毕凤琴.大口径输油管道腐蚀及防腐层失效分析[J].科学技术与工程,2010,10(32). |
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| 作者姓名： | 梁亚宁 孟庆武 毕凤琴 |
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| 作者单位： | 1. 中国石油大学(北京)石油工程教育部重点实验室,北京,102249
2. 东北石油大学材料科学与工程系,大庆,163318 |
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| 摘 要： | 对“庆—哈”输油管线管体进行腐蚀漏磁检测,管线腐蚀属于氧去极化腐蚀,主要形式为局部腐蚀。测试了管线经过地段土壤的土壤电阻率和管地电位等,土壤属于强腐蚀类。管线焊口部位的裂纹及残余应力及管道在穿、跨越附近侧下方土壤的氧浓差电池是引起穿孔的主要部位,而防腐层破损加上杂散电流作用是引起防腐层开裂主要原因。
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| 关 键 词： | 输油管道 腐蚀 失效分析 |
| 收稿时间： | 9/11/2010 9:33:47 AM |
| 修稿时间： | 9/11/2010 9:33:47 AM |
Failure analysis of large diameter oil pipeline corrosion mechanism and outer corrosion resistant layer |
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| liangyaning,bifengqin and bifengqin.Failure analysis of large diameter oil pipeline corrosion mechanism and outer corrosion resistant layer[J].Science Technology and Engineering,2010,10(32). |
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| Authors: | liangyaning bifengqin and bifengqin |
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| Institution: | LIANG Ya-ning,MENG Qing-wu1,BI Feng-qin1(China Petroleum Engineering and Construction Corporation,Beijing 100120,P.R.China,Department of Material Science and Engineering,Northeast Petroleum University1,Daqing 163318,P.R.China) |
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| Abstract: | The corrosion behavior of "Qing-Ha" oil pipeline was examined by magnetic flux leakage, the corrosion mechanism belong to the oxygen depolarization corrosion and localized corrosion process. Based on the testing of soil resistance ratio and corrosion potential, the corrosion rank of the soil was regarded as strong corrosion type. The pitting occured at some positions of welding seams for the crack and residual stress, and also some parts of pipeline under the cross and span of pipeline for the soil oxygen concentration cell. The disrepair of the outer corrosion resistant layer in addition to the stray current led to the crack failure. |
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| Keywords: | oil pipeline corrosion failure analysis |
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