Cover Image

Corrosion Behavior of Passivated Martensitic and Semi-Austenitic Precipitation Hardening Stainless Steel

This research aimed to conduct a passive layer state study on martensitic and semi-austenitic precipitation hardening stainless steels (PHSS) passivated in citric acid and nitric acid baths at 49 and 70 °C for 50 and 75 min and subsequently exposed in 5 wt.% NaCl and 1 wt.% H2SO4 solutions. Corrosio...

Full description

Bibliographic Details
Main Authors: Almeraya Calderón, Facundo, Samaniego Gámez, Pedro Oliver, Maldonado Bandala, Erick, Nieves Mendoza, Demetrio, Olguín Coca, Javier, Jáquez Muñoz, Jesús Manuel, Cabral Miramontes, José Ángel, Flores de los Ríos, Juan Pablo, Bautista Margulis, Raúl German, Gaona Tiburcio, Citlalli
Format: Article
Language:English
Published: Molecular Diversity Preservation International 2022
Subjects:
Ingeniería y Tecnología
TA Ingeniería General y Civil
Online Access:http://eprints.uanl.mx/25119/2/25119.pdf
Description
Summary:This research aimed to conduct a passive layer state study on martensitic and semi-austenitic precipitation hardening stainless steels (PHSS) passivated in citric acid and nitric acid baths at 49 and 70 °C for 50 and 75 min and subsequently exposed in 5 wt.% NaCl and 1 wt.% H2SO4 solutions. Corrosion behavior of the passivated material was observed by using potentiodynamic polarization (PP) according to the ASTM G5-11 standard. The microstructural analysis was performed by optical microscopy and scanning electron microscopy (SEM), while the passivated layer was characterized by X-ray photoelectron spectroscopy (XPS). The results indicated that the semi-austenitic-NA-50 min-70 °C sample showed the best corrosion resistance behavior in both solutions. The XPS characterization confirmed that the martensitic and semi-austenitic surface film presented a mixture of chemical compounds, such as Cr2O3 and Fe(OH)O, respectively.

Similar Items