Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel

Mott–Schottky analysis and electrochemical and X-ray photoelectron spectroscopy (XPS) measurements were performed on passive films formed on low-C 13CrNiMo stainless steel with different applied heat treatments. Heat treatments render particular microstructural features of the alloy with a significa...

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Autores principales: Gervasi, Claudio Alfredo, Méndez, Claudia Marcela, Bolzán, Agustín Eduardo, Bilmes, Pablo David, Llorente, Carlos Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Química
Ingeniería
Alloys
Heat treatment
Stainless steel
Passive films
Corrosion
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/143160
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-143160
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Ingeniería
Alloys
Heat treatment
Stainless steel
Passive films
Corrosion
spellingShingle Química
Ingeniería
Alloys
Heat treatment
Stainless steel
Passive films
Corrosion
Gervasi, Claudio Alfredo
Méndez, Claudia Marcela
Bolzán, Agustín Eduardo
Bilmes, Pablo David
Llorente, Carlos Luis
Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
topic_facet Química
Ingeniería
Alloys
Heat treatment
Stainless steel
Passive films
Corrosion
description Mott–Schottky analysis and electrochemical and X-ray photoelectron spectroscopy (XPS) measurements were performed on passive films formed on low-C 13CrNiMo stainless steel with different applied heat treatments. Heat treatments render particular microstructural features of the alloy with a significant impact on the ability of the passive films to afford adequate protection against localized corrosion. A lower level of retained austenite in the substrate renders thinner passive films. Phosphates coexist with oxidized Fe(III) compounds as the prevailing species in the anodic layers. Mo was only detected in the oxide film formed on the sample with a higher retained austenite content. Passive layers behave as n-type semiconductors with two types of donors, namely, shallow-level and deep-level states. The observed flat band potential V<sub>FB≅</sub> -0.425 ± 0.005 V vs. standard calomel electrode (SCE) is independent of the thermal treatment of the alloy but under potential bias conditions at the corrosion potential the occurrence of the cathodic reaction on the oxide surface is hindered on the sample with higher retained austenite in its microstructure as compared to the sample with lower retained austenite content.
format Articulo
Articulo
author Gervasi, Claudio Alfredo
Méndez, Claudia Marcela
Bolzán, Agustín Eduardo
Bilmes, Pablo David
Llorente, Carlos Luis
author_facet Gervasi, Claudio Alfredo
Méndez, Claudia Marcela
Bolzán, Agustín Eduardo
Bilmes, Pablo David
Llorente, Carlos Luis
author_sort Gervasi, Claudio Alfredo
title Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
title_short Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
title_full Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
title_fullStr Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
title_full_unstemmed Chemical composition and electronic structure of anodic passive films on low-C 13CrNiMo stainless steel
title_sort chemical composition and electronic structure of anodic passive films on low-c 13crnimo stainless steel
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/143160
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