一种少见的阴极保护系统失效情况分析
A Rare Failure Case Analysis of Cathodic Protection System
浏览(2326) 下载(1)
- DOI:
- 作者:
- 朱和智, 王育青
ZHU He-zhi, WANG Yu-qing
- 作者单位:
- 中国石油天然气管道局国际事业部 河北廊坊 065000
China Petroleum Pipeline Bureau, Langfang 065000, China
- 关键词:
- 保温管道;防腐层;阴极保护;检测
thermal insulation pipeline;anticorrosion layer;cathodic protection;testing
- 摘要:
- 北京某热电厂输油管道为硬质聚氨酯泡沫塑料保温层外加高密度聚乙烯夹克层的保温管道。为了摸清该管道现行阴极保护系统的运行状况,通过测量牺牲阳极的开路电位、输出电流和管道保护电位等参数,证实该管道阴极保护没有起到应有的作用。文章分析了该阴极保护系统失效的原因,提出了改进建议。其一,此类防腐结构的管道可以不采用阴极保护;其二,在设计和安装阴极保护系统时应对相邻管道的影响予以充分重视。
The oil transmission pipeline of a thermoelectric plant in Beijing is an insulation pipeline, which consists of a rigid PU foam thermal insulation layer with a high density PE jacket. In order to understand clearly the working status of a current cathodic protection system, the related parameters such as open circuit potential, output current and pipeline protection potential were tested. The test results shows the cathodic protection system of the pipeline does dot function as expected. After analyzing the reason of functional failure of the cathodic protection system, the corresponding improvements are suggested, which include: (1) pipeline with such insulation structure may not apply cathodic protection; (2) in design and installation of cathodic protection system, the effect of adjacent pipeline on cathodic protection should be paid more attention to.2007,4(4): 49-51 收稿日期：2006-10-26分类号：TE988作者简介：朱和智(1973-),男,河北沧州人,工程师,1996年毕业于北京科技大学腐蚀与防护专业,2006年毕业于加拿大卡尔加里大学MBA,从事国际项目管理工作,现任印度东气西输项目施工部副经理。参考文献：
[1] 中国腐蚀与防护学会.腐蚀与防护全书———电化学保护 [M]. 北京: 化学工业出版社, 1988.
[2] 韩钟琴, 刘志刚, 王育青.阴极保护对“管中管”管道的局限性[J].石油工程建设, 1992, 18(6) : 22- 25.