scholarly journals Mathematical Modeling of Cathodic Protection Using the Boundary Element Method with a Nonlinear Polarization Curve

1992 ◽  
Vol 139 (7) ◽  
pp. 1932-1936 ◽  
Author(s):  
J. ‐F. Yan ◽  
S. N. R. Pakalapati ◽  
T. V. Nguyen ◽  
R. E. White ◽  
R. B. Griffin
Keyword(s):  
Mathematical Modeling ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Polarization Curve ◽  
Cathodic Protection ◽  
Nonlinear Polarization ◽  
Element Method

Numerical Simulation of Cathodic Protection for Jack-Up Platform

2013 ◽  
Vol 813 ◽  
pp. 24-29
Author(s):  
An Kang Hu ◽  
Yu Guo ◽  
Wei Wang ◽  
Wei Jiang
Keyword(s):  
Numerical Simulation ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Cathodic Protection ◽  
Complex Structure ◽  
Simulation Method ◽  
Sacrificial Anode ◽  
Block Boundary ◽  
Jack Up ◽  
Element Method

For the jack-up platforms' huge size and complex structure, as well as the variation and complexity of their ambient corrosion environment, problems often arise in cathodic protection (CP) systems. The rise of the computer and the numerical simulation technology provide a new technical method to the prediction, evaluation and optimization of CP system for jack-up platform. Numerical simulation method has the advantage of examining potential maps of the entire structure easily and then the designer can determine the number and placement of anodes required to provide protection from the under and over protection regions based on a generic polarization response. In this paper the 3-D boundary element method was used to calculate the mathematical model of sacrificial anode CP system for a jack-up platform. Introduced piecewise quasi linearized method to deal with nonlinear problem of boundary conditions. Adopt block boundary element method to solve electrolyte inconsistency problem and points regional modeling to solve electrolyte discontinuous. From the results we can conclude that the jack-up platform sacrificial anode CP system meets the protection targets.

Optimization of Cathodic Protection System Design for Pipe-Lines Structure with Ribbon Sacrificial Anode Using BEM and GA

2011 ◽  
Vol 462-463 ◽  
pp. 1267-1272
Author(s):  
M. Safuadi ◽  
M. Ridha ◽  
Syifaul Huzni ◽  
Syarizal Fonna ◽  
Ahmad Kamal Ariffin ◽  
...  
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Cathodic Protection ◽  
Protection System ◽  
Sacrificial Anode ◽  
Laplace’S Equation ◽  
Laplace's Equation ◽  
Cathodic Protection System ◽  
Element Method ◽  
Pipe Lines

In this paper, combination of a boundary element formulation and genetic algorithm (GA) was developed and used for analyzing of cathodic protection systems of buried pipe-lines structures. It is very important to maintain the effectiveness of the cathodic protection system for pipeline structure, in order to lengthen the lifetime of the system. However, nowadays the evaluation of the effectiveness of the system only could be performed after the system applying in the field. This study was conducted to combine 2D boundary element method (BEM) and GA in order to evaluate the effectiveness of the cathodic protection system for pipe-lines structure using ribbon sacrificial anode. Two factors i.e. the soil conductivity and the distance between pipe-lines and anode, were analyzed by using the proposed method. In this method, the potential in the domain was modeled by Laplace’s equation. The anode and cathode areas were represented by polarization curves of different metals. Boundary element method was applied to solve the Laplace’s equation to obtain any potential and current density in the whole surface of the pipe. The pipe and anode were modeled into 2D model. The numerical analysis result shows that the optimum distance between pipe-lines and anode can be determined by combining BEM and GA.

The Evaluation of Cathodic Protection System Design by Using Boundary Element Method

2011 ◽  
Vol 339 ◽  
pp. 642-647 ◽  
Author(s):  
M. Ridha ◽  
M. Safuadi ◽  
Syifaul Huzni ◽  
Israr Israr ◽  
Ahmad Kamal Ariffin ◽  
...  
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Cathodic Protection ◽  
Storage Tank ◽  
Three Dimensional ◽  
Protection System ◽  
Sacrificial Anode ◽  
Protection Systems ◽  
Cathodic Protection System ◽  
Element Method

Cathodic protection system is one of corrosion protection systems that well acknowledged protecting infrastructure such as pipeline and storage tank. Early damage of the infrastructure can be caused by improper design of the protection system. Currently, many cathodic protection systems are designed only based on the previous experiences. It is urgently needed the tool that can be used to simulate the effectiveness of any design of cathodic protection system before the system is applied to any structure. In this study, the three-dimensional boundary element method was developed to simulate the effectiveness of sacrificial anode cathodic protection system. The potential in the domain was modeled using Laplace equation. The equation was solved by applying boundary element method, hence the potential and current density on the metal surface and at any location in the domain can be obtained. The boundary conditions on the protected structures and sacrificial anode were represented by their polarization curves. A cathodic protection system for liquid storage tank and submersible pump were evaluated in this study. The effect of placement of sacrificial anode were examined to optimize the protection system. The result shows that the proposed method can be used as a tool to simulate the effectiveness of the sacrificial anode cathodic protection system.

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