外部结构对储罐底板外壁阴极保护电位分布影响的数值模拟计算
Numerical Modeling of Cathodic Protection Potential Distribution on Exterior of Tank Bottom Affected by External Structure
摘 要
利用有限元和有限差分法，建立了储罐底板外壁阴极保护电位分布的数学模型，利用BEASY软件模拟计算外部结构对罐底外壁的阴极保护电位分布影响，包括接地类型、砂土层、阳极形式等。探讨了采用深井阳极对储罐底板外壁进行阴极保护时，输出电流较大、保护效果不理想的主要原因。
数值模拟计算
接地
砂土层
阳极形式
exterior of tank bottom
numerical simulation
grounding
sand layer
anode type
Abstract
The mathematical model of cathodic protection potential distribution on the exterior of tank bottom was established using Finite element and Finite differences method. The effect of external structure including the type of grounding, the sand layer and the type of anode etc. was also studied using BEASY software. Besides, the main reason of poor protection was discussed under high output current condition in the cathodic protection of the exterior of tank bottom using deep-well anode.
中图分类号 TG174 DOI 10.11973/fsyfh-202001012
所属栏目 应用技术
基金项目
收稿日期 2018/7/12
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引用该论文: WANG Peng,CHANG Zeliang,MAO Zhongqiang,LI Xianming,MAO Xueqiang. Numerical Modeling of Cathodic Protection Potential Distribution on Exterior of Tank Bottom Affected by External Structure[J]. Corrosion & Protection, 2020, 41(1): 64
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参考文献
【1】邱枫,徐乃欣. 钢质贮罐底板外侧阴极保护时的电位分布[J]. 中国腐蚀与防护学报,1996,16(1):29-36.
【2】CHIN D T,SABDE G M. Current distribution and electrochemical environment in acathodically protected crevice[J]. Corrosion,2000,56(3):229-237.
【3】KRANC S C,SAGUES A A. Detailed modeling of corrosion macrocells on steel reinforcing in concrete[J]. Corros Sci,2001,43:1355-1372.
【4】DEGIORGI V G,WIMMER S A. Geometric details and modeling accuracy requirements for shipboard impressed current cathodic protection system modeling[J]. Engineering Analysis with Boundary Elements,2005,29:15-28.
【2】CHIN D T,SABDE G M. Current distribution and electrochemical environment in acathodically protected crevice[J]. Corrosion,2000,56(3):229-237.
【3】KRANC S C,SAGUES A A. Detailed modeling of corrosion macrocells on steel reinforcing in concrete[J]. Corros Sci,2001,43:1355-1372.
【4】DEGIORGI V G,WIMMER S A. Geometric details and modeling accuracy requirements for shipboard impressed current cathodic protection system modeling[J]. Engineering Analysis with Boundary Elements,2005,29:15-28.
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