In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions

The composition of anodic films on iron formed at different potentials in neutral solutions has been investigated by in-situ UV–vis and IR spectroscopies in the presence of PO4 3−, a non-contaminant inhibitor used in anticorrosive paints. Optical and electrochemical determinations were used to detec...

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Autores principales: Borrás, C. A., Romagnoli, Roberto, Lezna, Reynaldo Oscar
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Química
Iron corrosion
Passivation
Coatings
Phosphate inhibitors
In-situ spectroscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/168740
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-168740
record_format dspace
spelling I19-R120-10915-1687402024-08-21T04:09:16Z http://sedici.unlp.edu.ar/handle/10915/168740 In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions Borrás, C. A. Romagnoli, Roberto Lezna, Reynaldo Oscar 2000-02-01 2024-08-20T16:47:18Z en Química Iron corrosion Passivation Coatings Phosphate inhibitors In-situ spectroscopy The composition of anodic films on iron formed at different potentials in neutral solutions has been investigated by in-situ UV–vis and IR spectroscopies in the presence of PO4 3−, a non-contaminant inhibitor used in anticorrosive paints. Optical and electrochemical determinations were used to detect and characterize two well-defined current waves in the active region of Fe and a following passive zone at more positive potentials. The response has been associated with the presence on the surface, in the dissolution zone, of Fe3 II[PO4]2 as the main species and probably some [FeIIIPO4]. [FeIIIPO4] has been detected in the passive region by in-situ IR spectroscopy. Only minor amounts of Fe2+ and Fe3+ species in solution have been detected optically. These phosphated overlayers are believed to provide extra protective properties to the passivating film. Centro de Investigación y Desarrollo en Tecnología de Pinturas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 1717-1725
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Iron corrosion
Passivation
Coatings
Phosphate inhibitors
In-situ spectroscopy
spellingShingle Química
Iron corrosion
Passivation
Coatings
Phosphate inhibitors
In-situ spectroscopy
Borrás, C. A.
Romagnoli, Roberto
Lezna, Reynaldo Oscar
In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
topic_facet Química
Iron corrosion
Passivation
Coatings
Phosphate inhibitors
In-situ spectroscopy
description The composition of anodic films on iron formed at different potentials in neutral solutions has been investigated by in-situ UV–vis and IR spectroscopies in the presence of PO4 3−, a non-contaminant inhibitor used in anticorrosive paints. Optical and electrochemical determinations were used to detect and characterize two well-defined current waves in the active region of Fe and a following passive zone at more positive potentials. The response has been associated with the presence on the surface, in the dissolution zone, of Fe3 II[PO4]2 as the main species and probably some [FeIIIPO4]. [FeIIIPO4] has been detected in the passive region by in-situ IR spectroscopy. Only minor amounts of Fe2+ and Fe3+ species in solution have been detected optically. These phosphated overlayers are believed to provide extra protective properties to the passivating film.
format Articulo
Articulo
author Borrás, C. A.
Romagnoli, Roberto
Lezna, Reynaldo Oscar
author_facet Borrás, C. A.
Romagnoli, Roberto
Lezna, Reynaldo Oscar
author_sort Borrás, C. A.
title In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
title_short In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
title_full In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
title_fullStr In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
title_full_unstemmed In-situ spectroelectrochemistry (UV-visible and infrared) of anodic films on iron in neutral phosphate solutions
title_sort in-situ spectroelectrochemistry (uv-visible and infrared) of anodic films on iron in neutral phosphate solutions
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/168740
work_keys_str_mv AT borrasca insituspectroelectrochemistryuvvisibleandinfraredofanodicfilmsonironinneutralphosphatesolutions
AT romagnoliroberto insituspectroelectrochemistryuvvisibleandinfraredofanodicfilmsonironinneutralphosphatesolutions
AT leznareynaldooscar insituspectroelectrochemistryuvvisibleandinfraredofanodicfilmsonironinneutralphosphatesolutions
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