A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes
The electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)<sub>2</sub> are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed....
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Autores principales: | , , , |
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Formato: | Articulo |
Lenguaje: | Inglés |
Publicado: |
1986
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/82352 |
Aporte de: |
id |
I19-R120-10915-82352 |
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dspace |
institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
collection |
SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Exactas Química Hierro Electrodos Electroquímica Electrólitos Alcalinización Hidróxidos |
spellingShingle |
Ciencias Exactas Química Hierro Electrodos Electroquímica Electrólitos Alcalinización Hidróxidos Albani, Oscar Alfredo Zerbino, Jorge Omar Vilche, Jorge Roberto Arvia, Alejandro Jorge A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
topic_facet |
Ciencias Exactas Química Hierro Electrodos Electroquímica Electrólitos Alcalinización Hidróxidos |
description |
The electrochemical and ellipsometric responses of iron electrodes in 0.04 M NaOH and in saturated Ca(OH)<sub>2</sub> are investigated at 25°C, in the potential range where the passivating layer in the absence of oxygen under potential controlled and non-equilibrium conditions is formed. From the correlation of results a composite structure of the passivating layer is envisaged involving an inner layer which is difficult to electroreduce, probably related to Fe<sub>3</sub>O<sub>4</sub>, and an outer gelatinous iron hydroxide layer where a relatively fast, Fe(II)/Fe(III) redox process can be voltammetrically followed.
The inhibitive properties of saturated Ca(OH)<sub>2</sub> as compared to 0.04 M NaOH are explained through the absorption of Ca<sup>2+</sup> ions at the outer plane of the inner part of the passivating film and the corresponding transport of water into the gelatinous part of the passivating film. |
format |
Articulo Articulo |
author |
Albani, Oscar Alfredo Zerbino, Jorge Omar Vilche, Jorge Roberto Arvia, Alejandro Jorge |
author_facet |
Albani, Oscar Alfredo Zerbino, Jorge Omar Vilche, Jorge Roberto Arvia, Alejandro Jorge |
author_sort |
Albani, Oscar Alfredo |
title |
A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
title_short |
A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
title_full |
A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
title_fullStr |
A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
title_full_unstemmed |
A comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
title_sort |
comparative electrochemical and ellipsometric study of the iron electrodes in different alkaline electrolytes |
publishDate |
1986 |
url |
http://sedici.unlp.edu.ar/handle/10915/82352 |
work_keys_str_mv |
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bdutipo_str |
Repositorios |
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1764820488191737857 |