Optimal positioning of anodes and virtual sources in the design of cathodic protection systems using the method of fundamental solutions

Santos, Wilian Jeronimo dos; Santiago, J.A.F.; Telles, J. C. F.

doi:10.1016/j.enganabound.2014.05.009

Cited by 19 publications

(10 citation statements)

References 21 publications

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“…The mesh is heterogeneous and the size growth ratio is 1.1 between adjacent units. The insulating boundary condition was applied to the out layer of the computational domain and the remaining surface of the samples since the beaker wall and the epoxy resin-covered surface are truly insulating [16][17][18]. The seawater is the electrolyte, which is around the coating samples with an isotropic 5 S/m conductivity.…”

Section: Physical Modelmentioning

confidence: 99%

“…There have already been numerous simulation studies (BEM, boundary element method) on the corrosion behaviors of thermal-sprayed AlZn coating in atmosphere environment simulation studies (BEM, boundary element method) on the corrosion behaviors of thermal-sprayed AlZn coating in atmosphere environment for thermal-sprayed AlZn coating [14]. Most of the work addressed the potential distribution, and seldom with the residual corrosion of substrate [12,[15][16][17]. However, the anti-corrosion performance is always different for AlZn alloy coatings and AlZn composite coatings.…”

Section: Introductionmentioning

confidence: 99%

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

Huang

Lou

Wang³

et al. 2017

Coatings

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Cold spray can deposit a composite coating simply by spraying mechanically-mixed Al and Zn powders, while no quantitative data has been reported on the anti-corrosion performance of different composite cold-sprayed coatings. In the present work, the finite element method was used to estimate the cathodic protection effect by simulating the potential distribution on a damaged cold-sprayed AlZn coating on Q235 steel. The results indicate that AlZn coating can only provide a limiting cathodic protection for substrate, because it can only polarize a very narrow zone negative to −0.78 V (vs. SCE, saturated calomel electrode). The remaining area of the steel substrate still has a very high residual corrosion rate. Computational methods can be used to predict the corrosion rate of AlZn coating, and the simulation results were validated by the results of a weight loss experiment.

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Section: Physical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Huang

Lou

Wang³

et al. 2017

Coatings

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“…In this section, the procedure for developing a hybrid finite element model with fundamental solution as interior trial function is described based on the boundary value problem defined by (1)- (3). Similar to the conventional FEM and HT-FEM, the domain under consideration is divided into a series of elements [15,16,21,[23][24][25][26][27][28][29][30].…”

Section: Assumed Independent Fieldsmentioning

confidence: 99%

“…A novel hybrid finite element formulation, called the hybrid fundamental solution based FEM (HFS-FEM), was recently developed based on the framework of hybrid Trefftz finite element method (HT-FEM) and the idea of the method of fundamental solution (MFS) [1][2][3][4][5]. In this method, two independent assumed fields (intraelement filed and auxiliary frame field) are employed and the domain integrals in the variational functional can be directly converted to boundary integrals without any appreciable increase in computational effort as in HT-FEM [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Fundamental Solution Based Finite Element Method: Theory and Applications

Cao

Qin

2015

Advances in Mathematical Physics

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An overview on the development of hybrid fundamental solution based finite element method (HFS-FEM) and its application in engineering problems is presented in this paper. The framework and formulations of HFS-FEM for potential problem, plane elasticity, three-dimensional elasticity, thermoelasticity, anisotropic elasticity, and plane piezoelectricity are presented. In this method, two independent assumed fields (intraelement filed and auxiliary frame field) are employed. The formulations for all cases are derived from the modified variational functionals and the fundamental solutions to a given problem. Generation of elemental stiffness equations from the modified variational principle is also described. Typical numerical examples are given to demonstrate the validity and performance of the HFS-FEM. Finally, a brief summary of the approach is provided and future trends in this field are identified.

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“…Furthermore, the effect of environmental factors such as seabed conductivity or seawater conductivity, depth and temperature on underwater electric field was studied [9][10][11]. The boundary element method is a method based on the weighted residual method, which converts the boundary value problem into a boundary integral equation problem and then uses the finite element discrete technique to construct linear equations [12]. BEM was applied to anticorrosion research of offshore engineering structures in the early 1980s [13,14].…”

Section: Introductionmentioning

confidence: 99%

Simulating Underwater Electric Field Signal of Ship Using the Boundary Element Method

Wang¹,

Xu²,

Zhang³

2018

PIER M

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Seawater conductivity is an important factor that affects the corrosion electric field of ship. A three-dimensional boundary element method (3D-BEM) combined with nonlinear polarization curve was employed to investigate the influence of seawater conductivity on the corrosion electrostatic field. Numerical simulation results show that the electric field distribution is only slightly influenced by the conductivity. However, the intensity decreases with the increases of conductivity. The simulation results of the BEM model were compared with the results of the equivalent electric dipole model, and the results obtained by the two methods had high similarity, which demonstrated that the BEM model was effective. The former is a more convenient and concise modeling method that can better reflect the distribution characteristics of ship's corrosion electric field than the electric dipole model.

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Optimal positioning of anodes and virtual sources in the design of cathodic protection systems using the method of fundamental solutions

Cited by 19 publications

References 21 publications

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

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

Hybrid Fundamental Solution Based Finite Element Method: Theory and Applications

Simulating Underwater Electric Field Signal of Ship Using the Boundary Element Method

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