Evaluación del efecto sinergístico entre la concentración de cloruros y el contenido de CO2 en un acero API 5l grado b, mediante la técnica de ruido electroquímico
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Evaluators
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Universidad Industrial de Santander
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En este trabajo se evaluó la corrosión por picado del acero API 5L grado B en una solución salina y saturada con CO2, las cuales hacen parte de los fluidos que interviene en la producción de crudo; la técnica utilizada para el estudio de este fenómeno fue la de ruido electroquímico (EN), para observar los posibles efectos sobre la superficie del electrodo; Las pruebas se realizaron a 25 y 45ºC, variando la concentración de ion Cl- entre 500 y 24000 ppm. Con el ensayo de ruido electroquímico se detectó de manera rápida el inicio del proceso de picado. Se llevaron a cabo pruebas de 2, 4, 6, 48, 480 horas, para garantizar un análisis confiable del fenómeno. Se pudo concluir que el comportamiento sinergístico entre los iones cloruros y el contenido de CO2 sobre el acero al carbono API 5L grado B sumergido en solución salina a diferentes concentraciones y saturada con CO2 por burbujeo afecta la microestructura del material.
In this study the pitting corrosion of steel API 5L grade B in saline solution and saturated with CO2 was evaluated, which are part of the fuids involved in oil production, the technique used for the study of this phenomenon was electrochemical noise (EN), to observe the possible effects on the electrode surface; The tests were performed at 25 and 45ºC, varying the Cl- ions concentration between 500 and 24000 ppm. With the electrochemical noise test was detected the onset of pitting process. Tests were conducted at 2, 4, 6, 48, 480 hours, to ensure a reliable analysis of the phenomenon. Was concluded that the synergistic behavior between chlorides ions and CO2 content on carbon steel API 5L grade B immersed in saline solution, at different concentrations and saturated by bubbling with CO2, affects the microstructure of the material.
In this study the pitting corrosion of steel API 5L grade B in saline solution and saturated with CO2 was evaluated, which are part of the fuids involved in oil production, the technique used for the study of this phenomenon was electrochemical noise (EN), to observe the possible effects on the electrode surface; The tests were performed at 25 and 45ºC, varying the Cl- ions concentration between 500 and 24000 ppm. With the electrochemical noise test was detected the onset of pitting process. Tests were conducted at 2, 4, 6, 48, 480 hours, to ensure a reliable analysis of the phenomenon. Was concluded that the synergistic behavior between chlorides ions and CO2 content on carbon steel API 5L grade B immersed in saline solution, at different concentrations and saturated by bubbling with CO2, affects the microstructure of the material.
Keywords
Localized corrosion, CO2 contained, steel API 5L Degree B, electrochemical noise, NaCl concentration, Corrosión localizada, contenido de CO2, acero API 5L Grado B, ruido electroquímico, concentración de NaCl