交流干扰下新的阴极保护准则I_(ac)/I_(dc)的研究  

Research on a New Cathodic Protection Criterion I_(ac)/I_(dc) under AC Interference Condition

作　　者：杨涛[1] 和宏伟[1] 关鸿鹏[2] 肖桂霞[2] 

机构地区：[1]北京科技大学,北京100083 [2]北京市燃气集团有限责任公司,北京100035

出　　处：《管道技术与设备》2012年第6期42-44,共3页Pipeline Technique and Equipment

摘　　要：文中探讨了交流杂散电流干扰下埋地管线钢新的阴极保护电位准则,即交直流比准则。利用PS-268A电化学测试仪,采用恒电位极化法测量试样保护电流密度,从而说明不同交直流比情况下的阴极保护效果。结果表明:在-850～-1 000 mV直流保护电位范围内,当交直流比值为5的情况下,实验中得到的保护电流密度最小,小于其他比值情况下103个数量级。在此保护电位范围内交直流比为5的情况下,对交流干扰下的埋地管线阴极保护效果最佳。This work is intended to study the new metal buried pipeline CP criterion under condition of AC interference,called Iac/Idc criterion.It explains the protection effect through protection current density measured by using the laboratory simulation device with a constant potential polarization method.The result shows that between the DC protection potential of-850 mV and-1 000 mV,there is a lowest corrosion rate and a protection current density when Iac/Idc is 5 which is 103 magnitudes lower than at the other ratio.The conclusion drawn from the result is that between the DC protection potential of-850 mV and-1 000 mV,when Iac/Idc is 5,the protection of the buried pipeline is the best.

关 键 词：交流电干扰 交直流比 阴极保护系统 阴极保护准则 

分 类 号：TE98[石油与天然气工程—石油机械设备]