埋地石油管道阴极防腐措施与风险预警研究  

Study on Cathodic Anticorrosion Measures and risk early Warning of Buried Oil Pipeline

作　　者：刘龙飞 张芯 胡衡 喻冰 吴凯旋 LIU Long-fei;Zhang Xin;HU Heng;YU Bing;WU Kai-xuan(Hualu Engineering Technology Co.,Ltd.,Xi'an 710065,China;PetroChina Guangxi Petrochemical Company,Qinzhou 535000,China;Gas Field Development Division of PetroChina Changqing Oilfield Company,Xi'an 710018,China;Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company,Chengdu 610031,China;Hanzhong Branch of Shaanxi Natural Gas Co.,Ltd.,Hanzhong 723000,China)

机构地区：[1]华陆工程科技有限责任公司,西安710065 [2]中国石油广西石化公司,钦州535000 [3]中国石油长庆油田分公司气田开发事业部,西安710018 [4]中石油西南油气田公司工程技术研究院,成都610031 [5]陕西省天然气股份有限公司汉中分公司,汉中723000

出　　处：《当代化工》2021年第5期1155-1158,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:51174046)。

摘　　要：根据埋地管道阴极保护现状,总结了阴极保护原理、分类。阴极保护主要是基于电化学腐蚀原理,采用外加电流及牺牲阳极两种保护方式。分析了目前准则存在的不足,阴极保护准则没有对管道允许受到的直流干扰程度做出明确的规定且-850 mV(CSE)准则不适用交流干扰情况,另外GB/T 21448—2008准则的适用温度不能超过40℃。分析了基于数值模拟研究埋地管道阴极保护的方法,阴极保护数值模拟基于理论建立阴极保护数学模型,设置边界条件对模型加以求解即可得到管道沿线的电位分布情况。结合管道风险预警理论对埋地管道的风险预警进行了研究。对埋地管道腐蚀风险预警流程进行设计,其应遵循风险识别、风险分析及风险等级划分的流程,时刻监视防腐措施的运行效果。According to the present situation of cathodic protection of buried pipeline, the principle and classification of cathodic protection were summarized. Cathodic protection is mainly based on the principle of electrochemical corrosion, using applied current and sacrificial anode protection. The deficiency of the current standard was analyzed, for example the cathodic protection standard does not clearly stipulate the allowable degree of DC interference on the pipeline, and the-850 mV(CSE) standard is not suitable for AC interference, in addition, the applicable temperature of GB/T 21448—2008 standard cannot exceed 40 ℃. The method of cathodic protection of buried pipeline based on numerical simulation was analyzed. The cathodic protection mathematical model was established based on theory, and the potential distribution along the pipeline was obtained by setting boundary conditions to solve the model. Combined with the pipeline risk early warning theory, the risk early warning of buried pipeline was studied. The early warning process of corrosion risk of buried pipeline should be designed, which should follow the process of risk identification, risk analysis and risk classification, and monitor the operation effect of anti-corrosion measures at all times.

关 键 词：管道 阴极保护 风险预警 腐蚀 

分 类 号：TE832[石油与天然气工程—油气储运工程]