交流杂散电流干扰对管道直流电位的影响

文中利用杂散电流测试仪器,在城市管道受到杂散电流干扰区域进行了杂散电流的详细测试.选取同一条管线的4个点进行了测试,通过测试结果分析杂散电流的大小和方向,判断交流杂散电流对燃气管道直流电位的影响,确定电流流入与流出位置,确定出管线最容易遭受到腐蚀的位置.利用测试结果的分析结论确定施加排流措施方案,并测试排流后的效果.测试结果表明:排流措施施加得当,排流效果良好,能够使阴极保护系统保持正常运行状态.

AC Stray Current Interference on Direct Potential of Pipeline

In this paper,testers tested stray current in city pipes in stray current interference area with the stray current mapper.They tested it in four areas of a pipeline and analyzed the size and direction of the stray current with test results to determine the impact of AC stray current on the direct potentical of gas pipeline and to find the current inflow and outflow locations.They determined the location of the pipeline as most vulnerable to corrosing.The use of conclusions of the analysis of test results to determine the imposition of drainage measures program,and test the effect of drainage.The test results show that the drainage measures was imposed properly,the drainage was well done,and the cathodic protection system was maintained in a normal state.