两点法电位检测储罐底板阴极保护效果评价  

The Double-point Potential Monitoring for Tank Bottom Catbodic Protection Effect Estimating Technique

作　　者：马伟平[1] 张国忠[2] 梁昌华 张大鹏 李柏丹[4] 安振山[5] 金图山[5] 

机构地区：[1]中国石油管道公司管道科技研究中心 [2]石油大学(华东)储运与建筑工程学院 [3]中石化管道储运公司东营输油首站 [4]石油大学(华东)计算机与通信学院 [5]中国石油管道公司秦京输油气分公司

出　　处：《油气储运》2005年第4期40-44,i004,共6页Oil & Gas Storage and Transportation

摘　　要：针对深井阳极对储罐底板阴极保护数值模拟中存在的缺陷,提出了一种根据典型电流密度分布假设求解保护电位的方法。根据阴极保护体系物理模型,近似计算了深井阳极极化电位,数值计算结果与现场实测电位数据的对比结果验证了数值方法的可靠性。通过计算,确定了单支深井阳极完全有效保护的临界储罐直径。根据数值计算结果,提出了两点法的电位检测储罐底板阴极保护效果评价技术。In allusion to the prevenient defaule in tank bottom eathodie protection numerical simulation using deep-well anode,neglecting the inconsecutivencss of the calculation environmental medium,the distinctness of the restriction conditions in metal material polarized potential curve experiment resulted in potential cal- based on one typical current density distribution hypothesis, the soil and the bitumen-sand groundwork composed the calculation environmental medium,approximately calculating polarized potential of the deep-well anode base on the cathodic protection physical model. This paper compares the field testing data with numerical result,proves the reliability of numerical method,studies the critical diameter tank which single deep-well anode can absolutely and effectively protect (equal to 56 m),develops the estimating technique of technique.

关 键 词：储罐底板 保护效果 电位检测 两点法 深井阳极 电流密度分布 计算结果 数值模拟 阴极保护 保护电位 物理模型 保护体系 极化电位 近似计算 数值方法 现场实测 有效保护 评价技术 可靠性 

分 类 号：TE988[石油与天然气工程—石油机械设备] TE988.2