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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/angeo-2019-132
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-132
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: regular paper 07 Oct 2019

Submitted as: regular paper | 07 Oct 2019

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A revised version of this preprint was accepted for the journal ANGEO and is expected to appear here in due course.

Evaluation of Possible Corrosion Enhacement Due to Telluric Currents: Case Study for Brazilian Pipeline

Joyrles Fernandes de Moraes1, Igo Paulino2, Livia Alves3, and Clezio Marcos Dinardini4 Joyrles Fernandes de Moraes et al.
  • 1Laboratório de Geofísica Computacional, Universidade Estadual de Campinas, Campinas, Brazil
  • 2Unidade Acadêmica de Física, UFCG, Campina Grande, Brazil
  • 3Divisão de Geofísica Espacial, INPE, São José dos Campos, Brazil
  • 4Divisão de Aeronomia, INPE, São José dos Campos, Brazil

Abstract. Electric field induced in the Brazil–Bolivia pipeline was calculated using a distributed source line transmission (DSLT) theory during several space weather events. It was made with using geomagnetic data collected by a fluxgate magnetometer located at São José dos Campos (23.2º S; 45.9º W). The total corrosion rate was calculated with using the Gummow (2002) methodology and based in the assumption of 1-cm hole in pipeline coating. The calculations were performed for the ends of pipeline, where the largest out of phase pipe-to-soil potential (PSP) variations were obtained. The variations in PSP during the 17 March 2015 magnetic storm have led to the greatest corrosion rate of the analysed events. All the space weather events evaluated with high terminating impedance in this paper have contributed to increase the corrosion process. The applied technique can be used to evaluate the metal loss due to the high telluric activity associated with the geomagnetic storms at specific locations.

Joyrles Fernandes de Moraes et al.

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Joyrles Fernandes de Moraes et al.

Joyrles Fernandes de Moraes et al.

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Short summary
Using the distributed source line transmission (DSLT) theory and magnetometers data, induced electrical field was calculated for the first time in a Brazilian pipeline. The corrosion rate was also evaluated using the Gummow's methodology. With different terminating impedance, the pipeline was out the safe range of operation, even for low terminating impedance. The corrosion rate was significant for strong geomagnetic storms, however it was not above the acceptable limit.
Using the distributed source line transmission (DSLT) theory and magnetometers data, induced...
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