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51315-6015-Investigating Railway Corrosion Caused by Cathodic Protection Systems

Picture for Investigating Railway Corrosion Caused by Cathodic Protection Systems
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Product Number: 51315-6015-SG
ISBN: 6015 2015 CP
Author: Christophe Baete
Publication Date: 2015
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$20.00
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Christophe BaetéElsyca n.v.Vaartdijk 3/603 3018 Wijgmaal Belgiumchristophe.baete@elsyca.comKoen De Gussume Gert SchevernelsInfrabel n.v.Frankrijkstraat 85 1060 Brusselkoen.degusseme@infrabel.be gert.schevernels@infrabel.beUnder normal operational conditions corrosion of railroads of DC electrified systems is rather limited but can cause a serious threat to buried pipelines. In order to avoid stray current corrosion pipeline operators install drainage systems and in some cases a CP impressed current system is directly connected to the railway infrastructure resulting in an increased corrosion attack of the rails especially at the rail crossings.The Belgian railway operator Infrabel has started a campaign to investigate different alternatives to reduce the corrosion risk of its railway network in a region containing 320 km of rail tracks and 620 km of pipelines. A first step in the process was to build a computational model to calculate the current exchange between the rail and pipeline network. The instantaneous corrosion rate of the rails and the potential variations of the pipelines were simulated for the complete region given the position of the trains for every second during a 24 hours period.In a second step the model was further refined with a measuring compaign.The computational model allowed performing a sensitivity analysis identifying the high risk zones investigating the impact of future extensions of therailway infrastructureand elaborating mitigative solutions such that the integrity of both railway and pipeline network is maintained.Keywords: DC stray current corrosion railway and pipelineintegrity dynamic computational modeling
Christophe BaetéElsyca n.v.Vaartdijk 3/603 3018 Wijgmaal Belgiumchristophe.baete@elsyca.comKoen De Gussume Gert SchevernelsInfrabel n.v.Frankrijkstraat 85 1060 Brusselkoen.degusseme@infrabel.be gert.schevernels@infrabel.beUnder normal operational conditions corrosion of railroads of DC electrified systems is rather limited but can cause a serious threat to buried pipelines. In order to avoid stray current corrosion pipeline operators install drainage systems and in some cases a CP impressed current system is directly connected to the railway infrastructure resulting in an increased corrosion attack of the rails especially at the rail crossings.The Belgian railway operator Infrabel has started a campaign to investigate different alternatives to reduce the corrosion risk of its railway network in a region containing 320 km of rail tracks and 620 km of pipelines. A first step in the process was to build a computational model to calculate the current exchange between the rail and pipeline network. The instantaneous corrosion rate of the rails and the potential variations of the pipelines were simulated for the complete region given the position of the trains for every second during a 24 hours period.In a second step the model was further refined with a measuring compaign.The computational model allowed performing a sensitivity analysis identifying the high risk zones investigating the impact of future extensions of therailway infrastructureand elaborating mitigative solutions such that the integrity of both railway and pipeline network is maintained.Keywords: DC stray current corrosion railway and pipelineintegrity dynamic computational modeling
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