Efecto de la temperatura en el comportamiento del acero inoxidable austenítico 316l frente a la corrosión electroquímica | Effect of temperature on the behavior of austenitic stainless steel 316 l exposed to electrochemical corrosión
Resumen
En esta investigación se evaluó el comportamiento a la corrosión de la aleación 316L a las temperaturas de 30, 45 y 60 ºC en medio salino. Para ello, se realizó la caracterización microestructural por microscopía electrónica de barrido (MEB) previo a los ensayos electroquímicos. Mediante las curvas de Tafel se observó un incremento en la rapidez de corrosión debido al aumento de la densidad de corriente al aumentar la temperatura. Las superficies de la aleación fueron caracterizadas después de los ensayos de corrosión a través de MEB e interferometría óptica (IO). Los resultados obtenidos evidenciaron un proceso de corrosión localizada por picaduras presentando formas, penetración y profundidad bien definidas.
Palabras clave: Acero inoxidable austenítico, corrosión electroquímica, polarización potenciodinámica.
ABSTRACT
This research assessed the corrosion behavior of alloy 316L at temperatures of 30, 45 and 60 °C in a saline solution. To do so, microstructural characterization was performed using scanning electron microscopy (SEM), prior to the electrochemical tests. By means of Tafel curves, there was observed an increase in corrosion rate due to the increase in current density caused by the shift to higher temperatures. After the corrosion test, the 316L alloy surfaces were characterized through SEM and Optical Interferometry (OI) analysis. The results showed a localized corrosion process characterized by pits which showed a well-defined morphology, penetration and depth.
Key words: Austenitic stainless steel, electrochemical corrosion, potenciodinamic polarization.
Palabras clave: Acero inoxidable austenítico, corrosión electroquímica, polarización potenciodinámica.
ABSTRACT
This research assessed the corrosion behavior of alloy 316L at temperatures of 30, 45 and 60 °C in a saline solution. To do so, microstructural characterization was performed using scanning electron microscopy (SEM), prior to the electrochemical tests. By means of Tafel curves, there was observed an increase in corrosion rate due to the increase in current density caused by the shift to higher temperatures. After the corrosion test, the 316L alloy surfaces were characterized through SEM and Optical Interferometry (OI) analysis. The results showed a localized corrosion process characterized by pits which showed a well-defined morphology, penetration and depth.
Key words: Austenitic stainless steel, electrochemical corrosion, potenciodinamic polarization.
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