相邻储罐底板阴极保护电位的分布

Cathodic Protection Potential Distribution of Adjacent Tank Botton

针对相邻储罐底板外侧阴极保护电位分布影响因素较多的特点,建立了储罐底板外侧阴极保护电位分布的数学模型。利用COMSOL完成对相邻储罐底板在不同因素下的阴极保护电位的求解。研究了恒电流、恒电位的阴极保护方式下,储罐的相邻距离及直径对罐底阴极保护电位分布的影响。结果表明:恒电流模式下相邻距离对保护电位分布的影响较小;恒电位模式下随相邻距离的增加,保护电位负向偏移;随直径增大,保护电位正向偏移;计算结果与实测结果吻合良好,可以为相邻储罐阴极保护电位分布规律的研究提供可靠依据。

A mathematical model of the cathodic protection potential distribution on the exterior of tank bottom was established.The COMSOL software was used to make calculation of adjacent tank bottom' s cathodic protection potential distribution under different factors.The effects of adjacent distance and diameter on cathodic protection potential distribution were studied under the cathodic protection mode of constant current or constant potential.Results showed that the effect of adjacent distance on the protection potential distribution was relatively small under constant current mode.With the increase of adjacent distance,the protection potential was shifted to negative values under constant potential mode.With the increase of diameter,the protection potential was shifted to positive values.The calculation results were in good agreement with the actual test ones.It could provide a reliable basis for the study of the cathodic protection potential distribution on adjacent tank.