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Cathodic protection design optimization of a buried vessel by FEM simulation
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-06-11 , DOI: 10.1002/maco.202011686 Mehdi Attarchi 1 , Andrea Brenna 1 , Marco Ormellese 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-06-11 , DOI: 10.1002/maco.202011686 Mehdi Attarchi 1 , Andrea Brenna 1 , Marco Ormellese 1
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Installing linear anode loops around a buried vessel is one of the latest cathodic protection anode arrangements for buried vessels. In this arrangement, besides the physical properties of the environment, for example, soil resistivity and oxygen content, the distance of anode loops to the vessel, number of anode loops, and distance between each loop are three main designing parameters. In the present study, the cathodic protection of a buried vessel (8‐m long; 2.5 m in diameter) with complete nonlinear polarization at the protected surface is studied with finite element method simulation. The analyzed variables are the number of anode loops from one to three, the anode‐to‐vessel distance from 0.2 to 0.6 m, the distance between loops from 0.2 to 1.6 m. Soil resistivity varies from 10 to 500 Ω·m, and oxygen limiting current density changes from 5 to 100 mA/m2. Increasing anode‐to‐vessel distances will reduce the potential differences, and the best condition is the maximum distance, 0.6 m. The optimum number of anode loops is two. Increasing soil resistivity will increase the potential difference, but in an optimum design, its effect is not significant.
中文翻译：
基于有限元模拟的埋藏船阴极保护设计优化
在埋入式容器周围安装线性阳极环是用于埋入式容器的最新阴极保护阳极装置之一。在这种布置中，除了环境的物理特性（例如，土壤电阻率和氧气含量）外，阳极回路到容器的距离，阳极回路的数量以及每个回路之间的距离是三个主要设计参数。在本研究中，采用有限元方法模拟研究了在受保护表面完全非线性极化的埋入式船只（长8m；直径2.5m）的阴极保护。分析的变量是阳极回路的数量从一到三个，阳极到容器的距离从0.2到0.6 m，回路之间的距离从0.2到1.6 m。土壤电阻率从10到500Ω·m不等，2。增大阳极到容器的距离将减小电势差，最佳条件是最大距离0.6 m。阳极回路的最佳数量是两个。增加土壤电阻率会增加电位差，但是在最佳设计中，其影响并不明显。
更新日期：2020-06-11
中文翻译：
基于有限元模拟的埋藏船阴极保护设计优化
在埋入式容器周围安装线性阳极环是用于埋入式容器的最新阴极保护阳极装置之一。在这种布置中，除了环境的物理特性（例如，土壤电阻率和氧气含量）外，阳极回路到容器的距离，阳极回路的数量以及每个回路之间的距离是三个主要设计参数。在本研究中，采用有限元方法模拟研究了在受保护表面完全非线性极化的埋入式船只（长8m；直径2.5m）的阴极保护。分析的变量是阳极回路的数量从一到三个，阳极到容器的距离从0.2到0.6 m，回路之间的距离从0.2到1.6 m。土壤电阻率从10到500Ω·m不等，2。增大阳极到容器的距离将减小电势差，最佳条件是最大距离0.6 m。阳极回路的最佳数量是两个。增加土壤电阻率会增加电位差，但是在最佳设计中，其影响并不明显。
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