Electrochemical characterization of passivated electrogalvanized steel

The chromate conversion treatment is widely used, but it requires highly toxic chromic acid solutions, with consequent effluent disposal and ecological problems [1-5]. The removal of these toxic chemicals is considered a priority within European Union. In this work, the corrosion resistance behavior...

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Autores principales: Tomachuk, C., Elsner, Cecilia Inés, Di Sarli, Alejandro Ramón
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2012
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/119308
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-119308
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Tomachuk, C.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Electrochemical characterization of passivated electrogalvanized steel
topic_facet Química
description The chromate conversion treatment is widely used, but it requires highly toxic chromic acid solutions, with consequent effluent disposal and ecological problems [1-5]. The removal of these toxic chemicals is considered a priority within European Union. In this work, the corrosion resistance behavior of three alternative pretreatments applied on electrogalvanized steel was investigated by electrochemical techniques. Their results were compared with those obtained for traditional Cr 6+-based pretreatment exposed to the same conditions. The experiments were carried out in aerated 0.3 M Na2SO4 solution, pH 10, at 25 °C. From the analyses and interpretation of the attained data could be inferred that the alternative coatings systems exhibited discrete protective properties in aerated alkaline sulfate solution. The nitro-cobalt chemical conversion treatment showed protective properties like the traditional Cr6+-based one, while the Cr3+-based pretreatment displayed a very poor anticorrosive performance, and the phosphate one initially provided good protective action but this decreased as the time elapsed. The EIS technique proved to be able for distinguishing between the protective properties afforded by each pretreatment exposed to an alkaline media.
format Objeto de conferencia
Objeto de conferencia
author Tomachuk, C.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
author_facet Tomachuk, C.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
author_sort Tomachuk, C.
title Electrochemical characterization of passivated electrogalvanized steel
title_short Electrochemical characterization of passivated electrogalvanized steel
title_full Electrochemical characterization of passivated electrogalvanized steel
title_fullStr Electrochemical characterization of passivated electrogalvanized steel
title_full_unstemmed Electrochemical characterization of passivated electrogalvanized steel
title_sort electrochemical characterization of passivated electrogalvanized steel
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/119308
work_keys_str_mv AT tomachukc electrochemicalcharacterizationofpassivatedelectrogalvanizedsteel
AT elsnerceciliaines electrochemicalcharacterizationofpassivatedelectrogalvanizedsteel
AT disarlialejandroramon electrochemicalcharacterizationofpassivatedelectrogalvanizedsteel
bdutipo_str Repositorios
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