Numerical Simulation of Transient Process for Corrosion Environment in Coating Crevice with Cathodic Protection

2012 ◽  
Vol 9 (9) ◽  
pp. 1395-1398 ◽  
Author(s):  
W.H. Wang ◽  
Jun Yi ◽  
Lin Chen ◽  
X.Y. Li
Keyword(s):  
Numerical Simulation ◽  
Transient Process ◽  
Cathodic Protection

scholarly journals Investigation on the Cathodic Protection Effect of Low Pressure Cold Sprayed AlZn Coating in Seawater via Numerical Simulation

Coatings ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 93 ◽  
Author(s):  
Guosheng Huang ◽  
Xiaodan Lou ◽  
Hongren Wang ◽  
Xiangbo Li ◽  
Lukuo Xing
Keyword(s):  
Numerical Simulation ◽  
Cathodic Protection ◽  
Low Pressure ◽  
Protection Effect

Notice of Retraction: Numerical simulation of cathodic protection on buried X80 steel

2010 ◽  
Author(s):  
Xinhua Chen ◽  
Hongyuan Chen ◽  
Weibin Wang ◽  
Linli Liu ◽  
Dongbei Sun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Cathodic Protection ◽  
X80 Steel

scholarly journals Cathodic Protection Simulation of Linear Anode Alongside Coated and Uncoated Pipe

CORROSION ◽  
10.5006/3377 ◽  
2020 ◽  
Vol 76 (4) ◽  
pp. 385-397 ◽  
Author(s):  
Mehdi Attarchi ◽  
Marco Ormellese ◽  
Andrea Brenna
Keyword(s):  
Numerical Simulation ◽  
Current Distribution ◽  
Cathodic Protection ◽  
Defect Size ◽  
Protection System ◽  
Effective Parameters ◽  
Soil Resistivity ◽  
Fundamental Parameters ◽  
Shift Criterion ◽  
Cathodic Protection System

Linear anode-pipe arrangement cathodic protection system with a complete nonlinear cathode boundary condition is analyzed by finite element method numerical simulation to extract the effective parameters for both coated and uncoated pipe. The results show that defect size ratio, linear anode-to-pipe distance, and pipe diameter are fundamental parameters to design an effective cathodic protection system able to guarantee a proper current distribution. Soil resistivity has a significant effect on the current distribution of both coated and uncoated pipe. The results show that the 100 mV potential shift criterion for a single linear anode-pipe arrangement can be ineffective and a two anode system may be required.

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.

Local cathodic protection design based on numerical simulation

2015 ◽  
Vol 62 (6) ◽  
pp. 407-415 ◽  
Author(s):  
Gan Cui ◽  
Zili Li ◽  
Lingyu Zhao ◽  
Xu Wei
Keyword(s):  
Numerical Simulation ◽  
Cathodic Protection ◽  
Real Life ◽  
High Energy ◽  
Shielding Effect ◽  
Content Type ◽  
Gas Stations ◽  
Protection Technology ◽  
Protection Potential ◽  
The Mathematical Model

Purpose – The purpose of this investigation was to study these problems and design regional cathodic protection, using numerical simulation. Regional cathodic protection technology is immature at home and abroad. This is reflected in the fact that in gas stations, there are many underground pipelines, which can lead to serious interference and shielding phenomena, and there are many grounding networks that can cause substantial loss of the cathodic protection current. Design/methodology/approach – Based on the above, in this article, first of all, the mathematical model of the buried pipeline cathodic protection potential distribution was established and the control equations solved using the boundary element method. Second, the cathodic shielding effect in pipeline concentration areas, the effect of instrument equipment grounding systems on cathodic protection and the influence of DC stray current on the interference of pipeline corrosion were studied separately using BEASY software. Finally, the BEASY software was used for a regional cathodic protection design for a real gas station. Findings – It was concluded that impressed current used in combination with sacrificial anodes for regional cathodic protection design is often the most economic and effective approach. However, the output current of the auxiliary anode is large with high energy consumption. In consequence, it may be recommended that the station pipelines should be laid on the ground, rather than under it. Originality/value – It is considered that the results can guide regional cathodic protection design for real-life installations very well.

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