焊管2024，Vol.47Issue(6)：62-68,7.DOI:10.19291/j.cnki.1001-3938.2024.06.011
20钢输油管道腐蚀穿孔原因分析
Cause Analysis of Corrosion and Perforation of 20 Steel Petroleum Transmission Pipeline
李冬 1刘迎来 1郭雷 2许彦 1吴金辉1
作者信息
- 1. 中国石油集团工程材料研究院有限公司,西安 710077||北京隆盛泰科石油管科技有限公司,北京 100101
- 2. 北京隆盛泰科石油管科技有限公司,北京 100101
- 折叠
摘要
Abstract
The perforation of seamless pipe was found during the inspection of a buried oil pipeline.The failure causes of buried pipelines were analyzed through the detection of anticorrosive layer,chemical composition analysis of pipes,mechanical properties test,macro and micro analysis of corrosion morphology,elemental composition test of corrosion products,scanning electron microscopy and energy spectrum analysis.The analysis results show that the test results of the buried pipeline anticorrosive layer do not meet the requirements of SY/T 0414-2017 standard,and the test results of the chemical composition and mechanical properties of the failed pipe meet the requirements of GB/T 8163-2018 standard.The failure of the buried pipeline is due to the discontinuity of the anticorrosive layer,which leads to the contact between the formation water and the pipe body.Dissolved oxygen in the water corrodes the pipe body by oxygen absorption,forming an undense layer of corrosion products,resulting in corrosion damage to the pipeline.Moreover,the existence of certain Cl-in the soil and formation water of the pipe ditch accelerates the process of point corrosion and perforation leakage of the pipe body,resulting in perforation and leakage of the pipe in a short time.关键词
无缝钢管/吸氧腐蚀/泄漏/失效分析Key words
seamless steel pipes/oxygen absorption corrosion/leakage/failure analysis分类
矿业与冶金引用本文复制引用
李冬,刘迎来,郭雷,许彦,吴金辉..20钢输油管道腐蚀穿孔原因分析[J].焊管,2024,47(6):62-68,7.
