Electrochemical corrosion behavior of passivated precipitation hardening stainless steels for aerospace applications
Villegas Tovar, José M. y Gaona Tiburcio, Citlalli y Lara Banda, María del Refugio y Maldonado Bandala, Erick y Baltazar Zamora, Miguel Ángel y Cabral Miramontes, José Ángel y Nieves Mendoza, Demetrio y Olguín Coca, Javier y Estupiñan López, Francisco H. y Almeraya Calderón, Facundo (2023) Electrochemical corrosion behavior of passivated precipitation hardening stainless steels for aerospace applications. Metals, 13 (5). pp. 1-18. ISSN 2075-4701
|
Texto
25412.pdf - Versión Publicada Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (5MB) | Vista previa |
Resumen
Precipitation-hardening (PH) stainless steels (SS) are widely used in various aerospace applications. These steels exhibit good mechanical and corrosion resistance. The electrochemical behavior of 15-5PH, 17-4PH, Custom450 and AM 350 stainless steels passivated with citric and nitric acid baths for 60 and 90 min at 25 and 49 °C were evaluated in 5 wt.% sodium chloride (NaCl) and 1 wt.% sulfuric acid (H2SO4) solutions. The electrochemical behavior was studied with potentiodynamic polarization curves (PPC) according to the ASTM G5-13 standard. The results indicated that there are two characteristic mechanisms that are present in the potentiodynamic polarization curves. When the PHSS is immersed in an H2SO4 solution, there is a secondary passivation, and in the NaCl solution, there is a pseudo-passivation (not stable passivation film). The current densities in the NaCl solution were between 10−4 and 10−5 mA/cm2, while those of H2SO4 were recorded around 10−2 and 10−3 mA/cm2. Citric acid does work as a passivating solution, and in some cases, the corrosion resistance of the stainless steel was comparable to that of nitric acid.
Tipo de elemento: | Article | |||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Palabras claves no controlados: | Corrosión, Polarización potenciodinámica, Endurecimiento por precipitación, Aceros inoxidables | |||||||||||||||||||||||||||||||||
Materias: | T Tecnología > TA Ingeniería General y Civil | |||||||||||||||||||||||||||||||||
Divisiones: | Ingeniería Mecánica y Eléctrica | |||||||||||||||||||||||||||||||||
Usuario depositante: | Dra Citlalli Gaona | |||||||||||||||||||||||||||||||||
Creadores: |
|
|||||||||||||||||||||||||||||||||
Fecha del depósito: | 24 Abr 2023 21:56 | |||||||||||||||||||||||||||||||||
Última modificación: | 24 Abr 2023 21:56 | |||||||||||||||||||||||||||||||||
URI: | http://eprints.uanl.mx/id/eprint/25412 |
Actions (login required)
Ver elemento |