埋地输油管道腐蚀缺陷分析及修复工艺  

Analysis and Repair Technology of Corrosive Defect on Buried Oil Pipelines

作　　者：郭淑娟[1] 陈保东[1] 王占黎[1] 王昆[1] 张文鹏[1] 

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001

出　　处：《管道技术与设备》2007年第2期41-43,共3页Pipeline Technique and Equipment

摘　　要：以东北输油管道为例,分析了埋地输油管线腐蚀特点及原因,认为管道的腐蚀主要是由于防腐层老化、剥离,导致出现阴极保护死区,该部位在土壤中氧浓差及细菌的作用下发生了电化学腐蚀;另外,管体表面膜不完整、阴保系统本身缺陷等也最终会加剧管道的腐蚀。提出了防腐层修复、管体补强(开挖技术如套袖补强、非开挖修复如内衬法等)的管道修复工艺要点及适用情况。The corrosion characteristics and reasons of pipelines were analyzed on the basis of finding out the corrosive condition （ Northeast oil pipelines）. It was considered that the main reason for pipelines corrosion was the aging and denudation anti-corrosive coating＇s, both of which lead to the skip area of cathodic protection. Electrochemical corrosion occurs in this area under the earth＇ s oxygen differential concentration and bacteria . On the other hand, pipelines corrosion can be aggravated by imperfect surface film and defect of a cathodic protection system. Thus,the technical processes and applicability of repairing the anti-corrosive coatings, enhancing the pipeline strength （including ditching technology,such as sleeve enhancement, non-ditching repair such as inner lining technology） had been proposed,which are of a theoretical and practical value .

关 键 词：输油管道 防腐层老化 电化学腐蚀 修复 

分 类 号：TE988[石油与天然气工程—石油机械设备]