Boundary element simulation of DC stray currents in oil industry due to cathodic protection interference

Metwally, I.A.; Al-Mandhari, H.M.; Nadir, Zia; Gastli, Adel

doi:10.1002/etep.140

Cited by 17 publications

(6 citation statements)

References 9 publications

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“…O2+2H2O+4e -→4OH -When stray currents induce pipeline corrosion, the Faraday' law should be conformed [11] = n c JM K nF (6) In eq. (6) Kc is the amount of metal corrosion, Jn is the normal current density, M is atomic mass of the metal, F is the Faraday' constant, and n is the number of electrons required for the reaction.…”

Section: Reaction Chemistrymentioning

confidence: 99%

Numerical modelling of buried pipelines under DC stray current corrosion

Zhang

Feng

et al. 2019

J. Electrochem. Sci. Eng.

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<p class="PaperAbstract">Corrosion of buried pipelines caused by stray currents is becoming a serious industrial and environmental problem. It is therefore necessary to study corrosion mechanisms of buried pipelines under DC stray currents in order to propose effective anti-corrosion measures. Since measurement of the potential is one of important ways to identify stray current intensity, the COMSOL Multiphysics software was used to simulate stray current corrosion dynamics of buried pipelines. It was also used to calculate the distribution and intensity changes of electrolyte potential in the cathodic protected system by solving Laplace’s three-dimensional equation. The obtained results showed that increased applied voltage leads to more positive shift of a pipeline potential, resulting in acceleration of stray current corrosion. On the contrary, increased soil resistivity can retard the corrosion process. The protected pipeline with a sacrificial anode suffers less corrosion interference than unprotected pipeline. Two crossed arrangement of pipelines makes no difference in corrosion of protected pipeline, but affects greatly on unprotected pipeline.</p>

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Section: Reaction Chemistrymentioning

confidence: 99%

Numerical modelling of buried pipelines under DC stray current corrosion

Zhang

Feng

et al. 2019

J. Electrochem. Sci. Eng.

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“…26 pipelines and well casings of oil fields. 27 The conclusion was drawn that the impressed current cathodic protection system would produce stray currents in the surrounding nonprotected structures. In the studies of Trevelyan and Hack, the boundary element methods were applied to simulate the stray current problem of long steel plates near the cathodic protection system of the ship.…”

Section: F I G U R E 1 Structure Of Insulated Coatings and Uninsulatementioning

confidence: 99%

“…Metwally et al. used boundary element cathodic protection numerical simulation software to simulate the DC stray current problems in pipelines and well casings of oil fields . The conclusion was drawn that the impressed current cathodic protection system would produce stray currents in the surrounding nonprotected structures.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical corrosion kinetics of cold spray copper composite coatings in a high potential region

Ding

Jia

et al. 2018

Int J of Chemical Kinetics

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In this paper, copper composite anticorrosion and antifouling coatings were prepared by a cold spray technique. Polarization experiments of the coatings were performed by rotating ring‐disk electrode technology at high potential. The electrochemical reaction mechanisms were proposed, and corresponding polarization kinetics models were built. Experimental results show that the copper and cuprous oxide formed corrosion microcells in the coatings, and the cuprous oxide did not alter the electrochemical reaction process of copper. In the high potential region (about 0.2–0.8 V), a CuCl film formed on the surface of the coatings was not damaged or broken down. The film played a role in corrosion protection. The currents in the high potential region increased relative to the limiting current 1. Because in the high potential region,0.33em CuCl 2− was produced by the dissolution of the CuCl film and was oxidized to Cu2+. In addition to being oxidized to Cu2+, CuCl 2− has the other two destinations, which were deposition as a CuCl film and diffusion to the solution bulk. The three processes were in parallel competition relations. In the limiting current 2 region, oxidation of CuCl 2− was dominant. A rate‐controlling step of electrochemical dissolution of the coatings in the high potential region was the diffusion processes of CuCl 2− and Cu2+. The electrochemical polarization kinetic models based on the reaction mechanisms established in this research accorded well to the experimental results. It demonstrated the rationality of polarization kinetics models and reaction mechanisms.

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“…The "field approach", e.g., the Boundary Element Method, can be used to model the electrochemical polarization that occurs on the subjected structure [5][6][7]. On the other hand, the "electric circuit" approach, based on ground-return circuit theory , is more suitable for modeling extended structures (pipelines and cables).…”

Section: Introductionmentioning

confidence: 99%

Modeling Effects of Stochastic Stray Currents from D.C. Traction on Corrosion Hazard of Buried Pipelines

2019

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The main problems discussed in the article concern the analysis of the phenomenon of stray currents generated by electric D.C. traction currents. These currents flow in the ground and, when they encounter an underground metal structure, can lead to the acceleration of electrochemical corrosion. There is a stochastic phenomenon that depends on many factors such as the position of the traction vehicle along the route or the current drawn by it from the traction network. The presented research concerns the use of probabilistic methods to analyze this phenomenon. The proposed algorithm allows determining the occurrence of electrochemical-pipeline corrosion risk for geometrically complex traction-pipeline systems, including many random variables and corrosion phenomena. The non-deterministic solution to such an interdisciplinary problem is an element of novelty.

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Boundary element simulation of DC stray currents in oil industry due to cathodic protection interference

Cited by 17 publications

References 9 publications

Numerical modelling of buried pipelines under DC stray current corrosion

Numerical modelling of buried pipelines under DC stray current corrosion

Electrochemical corrosion kinetics of cold spray copper composite coatings in a high potential region

Modeling Effects of Stochastic Stray Currents from D.C. Traction on Corrosion Hazard of Buried Pipelines

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