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

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URL o página oficial: https://doi.org/10.3390/met13050835

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:
CreadorEmailORCID
Villegas Tovar, José M.NO ESPECIFICADONO ESPECIFICADO
Gaona Tiburcio, Citlallicitlalli.gaonatbr@uanl.edu.mxorcid.org/0000-0001-9072-3090
Lara Banda, María del RefugioNO ESPECIFICADONO ESPECIFICADO
Maldonado Bandala, ErickNO ESPECIFICADONO ESPECIFICADO
Baltazar Zamora, Miguel ÁngelNO ESPECIFICADONO ESPECIFICADO
Cabral Miramontes, José ÁngelNO ESPECIFICADONO ESPECIFICADO
Nieves Mendoza, DemetrioNO ESPECIFICADONO ESPECIFICADO
Olguín Coca, JavierNO ESPECIFICADONO ESPECIFICADO
Estupiñan López, Francisco H.NO ESPECIFICADONO ESPECIFICADO
Almeraya Calderón, Facundofacundo.almerayacl@uanl.edu.mxorcid.org/0000-0002-3014-2814
Fecha del depósito: 24 Abr 2023 21:56
Última modificación: 24 Abr 2023 21:56
URI: http://eprints.uanl.mx/id/eprint/25412

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