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Article . 2024
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Sensibilización y corrosión en AISI 316L

Authors: Inés, Mariano Nicolás; Mansilla, Graciela Analía;

Sensibilización y corrosión en AISI 316L

Abstract

Este trabajo estudia la corrosión acelerada de acero inoxidable AISI 316L bajo exposición a una atmósfera salina durante 96h. Previamente, las muestras fueron solubilizadas a 1100°C durante 1h y luego enfriadas en agua o aire, seguidas de una sensibilización isotérmica a 650°C durante 6h. El análisis microestructural, mediante microscopía óptica y electrónica de barrido, reveló ataques severos en los bordes de grano austeníticos, atribuidos a la precipitación de distintos tipos de carburos de cromo y fases intermetálicas, como lo confirmó la difracción de rayos X. Los ensayos de corrosión indicaron que la muestra enfriada en aire presentó una mayor tasa de degradación y pérdida de masa, con un avance significativo de la corrosión intergranular, en comparación con la muestra enfriada en agua. Estos hallazgos destacan la influencia de los tratamientos térmicos sobre la susceptibilidad a la corrosión localizada.

This work studies the accelerated corrosion of AISI 316L stainless steel under exposure to a saline atmosphere for 96h. The samples were previously solution-treated at 1100°C for 1 hour and then cooled in water or air, followed by isothermal sensitization at 650°C for 6h. Microstructural analysis, using optical and scanning electron microscopy, revealed severe attacks at the austenitic grain boundaries, attributed to the precipitation of different types of chromium carbides and intermetallic phases, as confirmed by X-ray diffraction. Corrosion tests indicated that the air-cooled sample exhibited a higher degradation rate and mass loss, with significant advancement of intergranular corrosion, compared to the water-cooled one. These findings highlight the influence of heat treatments on susceptibility to localized corrosion.

Fil: Inés, Mariano Nicolás. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Fil: Mansilla, Graciela Analía. Universidad Tecnológica Nacional. Facultad Regional San Nicolás; Argentina

Country
Argentina
Keywords

CORROSIÓN INTERGRANULAR, TRATAMIENTOS TÉRMICOS, CARBUROS, DEGRADACIÓN, https://purl.org/becyt/ford/2.5, https://purl.org/becyt/ford/2

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green