地上储罐底板阴极保护实施与更新  

Implementation and update of cathodic protection of land storage tank's bottom plate

作　　者：吴志平[1] 付立武[1] 敖镇海[2] 王仓 苗松 

机构地区：[1]中国石油天然气股份有限公司,北京100007 [2]中国石化管道储运公司新乡输油处,河南新乡453000 [3]河南省啄木鸟地下管线检测有限公司,河南新乡453000

出　　处：《油气储运》2013年第10期1084-1088,共5页Oil & Gas Storage and Transportation

摘　　要：地上大型储罐罐底板的阴极保护是决定储罐运行寿命的关键技术。介绍了储罐罐底板的各种阴极保护技术、阳极的埋设方式和保护电流的流动特点,指出采用柔性阳极的阴极保护技术是新建储罐阴极保护设计及旧罐底板阴极保护更新的首选方案。当前,影响罐底板阴极保护系统维护的主要因素是参比电极的稳定性、精度及位置排布。基于某直径45 m大型储罐阴极保护设计更新实践,指出对于大型裸罐底,可以通过阴极保护的高水平设计,大幅降低储罐罐底板阴极保护成本。The cathodic protection on bottom plates of large-scale aboveground storage tank is the critical technology that determines service life of the storage tank.Various cathodic protection techniques for the bottom plates,anode placement manners and flow characteristics of protective current are described.It is pointed out that the cathodic protection technique using a flexible anode is the preferred solution for the design of cathodic protection system to a newly-built storage tank and renovation of cathodic protection system for an old tank＇s bottom plates.Currently,the major factors influencing the maintenance of a cathodic protection system include stability,accuracy and positional arrangement of the reference electrode.Based on the practice of design and renovation of cathodic protection system for a 45 m diameter tank,it is suggested that for the exposed oversized bottom,cathodic protection system cost can be reduced significantly by providing improved design for cathodic protection system for a large-scale tank.（8 Figures,6 References）

关 键 词：地上储罐 罐底板 阴极保护 牺牲阳极 参比电极 深阳极地床 柔性阳极 

分 类 号：TE821[石油与天然气工程—油气储运工程] TE988