一种管道强制电流阴极保护长度和电流的计算方法  

A Calculation Method for Length and Current of Cathodic Protection with Forced Current in Pipelines

作　　者：刘国 LIU Guo(Beijing Cathtop Technology Co.,Ltd.,Beijing 100o00,China)

机构地区：[1]北京凯斯托普科技有限公司,北京100000

出　　处：《腐蚀与防护》2024年第1期99-103,共5页Corrosion & Protection

摘　　要：管道阴极保护范围和保护电流的计算是阴极保护设计中的重要环节。针对现有标准中计算公式存在的问题,基于传输线理论进行了管道衰减公式的推导,通过衰减公式明确了阴极保护范围关键计算参数的物理含义,研究了现有计算公式的误差来源,进而提出了新的计算公式。新的计算公式具有更高的准确性。The calculation of pipeline cathodic protection range and protection current requirement is an important part during the design procedure of cathodic protection.Aiming at the problems in the calculation formulas in existing standards,the pipeline attenuation formula was deduced based on transmission line theory.Through the attenuation formula,the physical meaning of key parameters for the calculation of cathodic protection range was clarified,and the error sources of the existing calculation formulas were studied.Furthermore,a new calculation formula was proposed,which had higher accuracy than the traditional one.

关 键 词：阴极保护 衰减 电位偏移 电流密度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]