Study of electrical interference as a result of the proximity of printed current systems
Abstract
Corrosion control systems using the printed current technique are installed in the pipelines that transport hydrocarbons, however, the trajectories in some cases are similar with different owners, so that each one supplies and supplies its PC. The present study analyzes factors that can be identified as electrical interferences due to the proximity of the printed current systems, according to data in the monitoring of potentials, disturbances in the electrical potential between both pipelines have been observed placing this problem in two kilometers near the location of the DC current printing system, to perform the analysis, 3 tests were carried out with the technique of surveys of potential CIS with the aim of identifying points with problems affected by the systems of printed current; Among the affected results, it is observed that an influence is effectively generated between both systems where there are overprotection potentials above -2700 mv CSE referred to NRF-047-PEMEX-2014, alternatively a mapping of conditions of coating by the DCVG technique, detecting a coating failure which does not present severity when typed as type D according to NRF-047-PEMEX-2014, the analysis of the location of the anodic bed plays an important role derived that the geometry It is important in the dispersion of current and in these cases we must not forget that it is the same terrain (electrochemical system) when considering the ground as an electrolyte between both systems, so constant monitoring is recommended since they can create areas susceptible to accelerated corrosion.
Downloads
References
Peabody´s Control of Pipeline Corrosion second edition Ronald. L. Bianchetti. NACE International.
Ávila Mendoza Javier y GenescaLlongueras Joan. 1996. Más allá de la herrumbre II. La lucha contra la corrosión. Fondo de cultura económica, México D.F., segunda reimpresión.
Manual de corrosión básica NACE International. CertificationApplication Houston, Texas.
Parker Marshall. E / Edward G. Peattie. Pipe line corrosión and cathodic protection a practical manual for corrosión engineers, technicians, and field personnel. Gulf professional publishing an imprint of Butterworth-Heinemann Edition 3 1999. Houston Texas.
Norma NRF-030-PEMEX-2003, “Diseño, Construcción, Inspección y Mantenimiento de Ductos Terrestres para Transporte y Recolección de Hidrocarburos”, Comité de Normalización de Petróleos Mexicanos y Organismos Subsidiarios, 2003.
Norma NRF-026-PEMEX-2001, “Protección con Recubrimientos Anticorrosivos para Tuberías enterradas o sumergidas”, Comité de Normalización de Petróleos Mexicanos y Organismos Subsidiarios, 2001.
Cathodic Protection Nivel 1 NACE National Association of Corrosión Engineers. Houston, Texas. 2000.
Norma Oficial Mexicana NOM-007-SECRE-1999, “Transporte de gas natural”, Secretaría de Energía, 1999.
Norma NACE Standard RP0169-2002, “Control of External Corrosión on Underground or Submerged Metallic Piping Systems”, National Association of Corrosión Engineers, 2002.
Norma NRF-004-PEMEX-2003, “Protección con recubrimientos anticorrosivos a instalaciones superficiales de ductos” comité de normalización de petróleos mexicanos y organismos subsidiarios. 2003.
Norma NRF-047-PEMEX-2007, “Diseño, Instalación y mantenimiento de los Sistemas de Protección Catódica”, Comité de Normalización de Petróleos Mexicanos y Organismos Subsidiarios, 2002.
SP0502-2008. Standard Practice Pipeline External Corrosion Direct Assessment Methodology
Recubrimientos en conjunto con protección catódica”, NACE International, 2007.
Coating Inspector Program (CIP) level 1 Course Manual NACE International, December 2007.
Norma Oficial Mexicana NOM-008-SECRE-1999 Control de la corrosión externa en tuberías de acero enterradas y/o sumergidas.
Corrosión y Degradación de Materiales”. Otero Huerta Enrique. Editorial síntesis 1997.
La corrosión del concreto en ambiente marino. Ing. Manuel Gonzales de la lotera. ASOCEM asociación de productores de concreto.
Corrosión technology Philip A. Schweitzer Amy Forsgren Taylor and Francis. York Pennsylvania. 1997
Corrosión in Refineries. Edited by J.D Harston and F. Ropital European federation of corrosión publications number 42. Woodhead publishing limited Cambridge England.
L.L. Shreir, R.A. Jarman, G.T. Burstein, CorrosiónVolumen I Meta/ Environment Reactions. Editor Butterworth-Heinemann Linacre House Jordan Hill Oxford 2000.
Editor W. von Baeckmann, W. Schwenk W. Prinz, Handbook of cathodiccorrosión protection. Theory and practice of electrochemical protection processes Edition 3 1997 Gulf professional Publishing.
Cathodic Protection Nivel 2 NACE National Association of Corrosión Engineers. Houston, Texas. 2006
Cathodic Protection Nivel 3 NACE National Association of CorrosiónEngineers. Houston, Texas. 2007
Manual de entrenamiento de la técnica de gradiente de voltaje DC, instituto de investigaciones eléctricas, 2005.
