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[1]薛致远,张丰,毕武喜,等.东北管网阴极保护通电/断电电位测量与分析[J].油气储运,2010,29(10):772-773,787.[doi:10.6047/j.issn.1000-8241.2010.10.014]
　Xue Zhiyuan,Zhang Feng,Bi Wuxi.The Measurement and Analysis of On/Off-potential in Northeast Oil Pipeline Networks[J].Oil & Gas Storage and Transportation,2010,29(10):772-773,787.[doi:10.6047/j.issn.1000-8241.2010.10.014]
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东北管网阴极保护通电/断电电位测量与分析

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 29 期数: 2010年10期 页码: 772-773,787 栏目: 出版日期: 2010-10-25
Title:
The Measurement and Analysis of On/Off-potential in Northeast Oil Pipeline Networks
作者:
薛致远1;  张丰1;  毕武喜1;  罗鹏1;  张永盛2;  高强2;  王保春2
1. 中国石油管道科技研究中心;
2. 中国石油管道公司
Author(s):
Xue Zhiyuan1;  Zhang Feng1;  Bi Wuxi1
关键词:
埋地管道; 东北管网; 阴极保护; 防腐; 通电电位; 断电电位
Keywords:
buried pipeline; Northeast Oil Pipeline Networks; cathodic protection; corrosion control; On-potential; Off-potential
DOI:
10.6047/j.issn.1000-8241.2010.10.014
摘要:
评判管道是否受到充分的阴极保护,需要进行断电电位测量。介绍了管道阴极保护通电/断电电位的测量方法,测量了东北管网的通电/断电电位,结果表明:恒电位仪给定电位普遍偏低,达到-850mV准则的管段仅占测量管段的65%,23%的管段需使用100mV极化准则才能评判为受到充分保护;通电电位沿里程变化的规律性较强,断电电位则无明显规律;防腐层劣化程度是影响IR降的主要因素,对于同一条管道,管段防腐层老化越严重,IR降越大;阴极保护电位是防腐系统的重要参数,断电电位明确反映了管道是否受到充分的阴极保护,而通电电位的分布同时反映了阴极保护状态和管道防腐层的劣化程度。东北管网约97%的管段经整改可以受到充分的阴极保护,但约3%的管段处于杂散电流干扰区,尚无成熟的整改方案。
Abstract:
In order to evaluate the cathodic protection level of a pipe section,it is necessary to measure its Off-potential,The measuring methods of On Off-potential are introduced,The measuring results of On Off-potential in Northeast Oil Pipeline Networks showed that the given potential values of the potentiostat were generally lower at a certain extent.If Off-potential criterion at-850 mV (vs,CSE) was used to judge the level of cathodic protection,only 65% of measured pipe sections would be fully protected,while 23% of measured pipe sections can be considered to be well protected if 100 mV polarization criterion will be used to evaluate the cathodic protection of those pipe sections,The On-potential values regularly changed along the pipe section,while the change of its Off-potential values did not appear significant tendency,The results also illustrated that the degree of coating degradation was the main factor affecting IR drop,The cathodic protection potential was an important parameter in pipeline’s anti-corrosion system,Off-potential was clearly reflected whether the pipeline was fully protected or not,while the distribution of On-potential reflected both the state of cathodic protection and the degree of coating degradation,If proper technology reform were carried out,about 97% of pipe sections in Northeast Oil Pipeline Networks would be fully cathodic protected,However,there is no mature solution fo those pipe sections (about 3%) suffering the stray current interference.

参考文献/References:

[1] 胡士信,张本革,石薇,等.GB/T 21448-2008埋地钢质管道阴极保护技术规范[S].北京:中国标准出版社,2008.
[2] 张平,秦兴述,黄春蓉,等.GB/T 21246-2007埋地钢质管道阴极保护参数测量方法[S].北京:中国标准出版社,2007.

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备注/Memo

收稿日期:2010-1-29。
作者简介:薛致远,高级工程师,1972年生,1995年毕业于天津大学腐蚀与防护专业.现主要从事长输埋地管道腐蚀与控制的研究工作.电话:0316-2170727.E-mail:zyxue@petrochina.com.cn

更新日期/Last Update: 1900-01-01