油气管道直流杂散电流腐蚀防护研究进展.pdfVIP

2015年 2015 第6期 Pipeline Technique and Equipment No．6 油气管道直流杂散电流腐蚀防护研究进展 1 2 1 3 孙云峰 ,李 毅 ,王中良 ,梁 晶 (1.中石油北京油气调控中心,北京 100007;2.中石油西南管道公司,四川成都 610041;3.中石油规划总院,北京 100083) 摘要:以国内外油气管道直流杂散电流腐蚀的研究成果为基础,分析了直流杂散电流腐蚀的机理、 特点,列举了国内外直流杂散电流腐蚀测试方法,同时总结了目前直流杂散电流腐蚀的防护技术与防 护方案。 基于国内外对直流杂散电流腐蚀的研究进展,通过对比分析,提出了测试与防护的相关建议。 关键词:油气管道;直流杂散电流;测试;防护措施;腐蚀 - - - 中图分类号:TE988 文献标识码:A 文章编号:1004 9614(2015)06 0034 03 Development of DC Stray-current Corrosion Protection Study on Oil and Gas Pipeline 1 2 1 3 SUN Yun-feng ,LI Yi ,WANGZhong-liang ,LIANGJing (1.PetroChina Oil and Gas Pipeline Control Center,Beijing 100007,China; 2.PetroChina Southwest Pipeline Company,Chengdu 610041,China; 3.PetroChina Planning and Engineering Institute,Beijing 100083,China) Abstract:Basedontheresearchresultsof DCstray-currentcorrosionofoilandgaspipelineathomeandabroad,themech- anismandcharacteristicsof DCstray-currentcorrosionwereanalyzed.TheDCstray-currentcorrosiontestmethodsathomeanda- broadwere listed. At the same time,the current DC stray-current corrosion protection technology and protection scheme were summarized. Based on the study of DC stray-current corrosion at home and abroad,advices on testing methods and protection strategies are given by comparision. Key words:oil and gas pipeline;DC stray-current;monitoring;protection;corrosion 1 直流杂散电流腐蚀机理及特点 当直流电流沿地面敷设的铁轨流动时,直流电流 从铁轨绝缘不良处泄漏到大地,进入管道,沿管