Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel

The chromate conversion treatment is widely used, but it requires highly toxic chromic acid solutions with the consequent effluent disposal and ecological problems. The removal of these toxic chemicals is considered a priority within European Union. The corrosion resistance of three alternative trea...

Descripción completa

Detalles Bibliográficos
Autores principales: Tomachuk, C. R., Elsner, Cecilia Inés, Di Sarli, Alejandro Ramón
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ingeniería Química
conversion-coating, electrodeposition, electrochemical techniques, corrosion
Metales
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75590
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75590
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Química
conversion-coating, electrodeposition, electrochemical techniques, corrosion
Metales
spellingShingle Ingeniería Química
conversion-coating, electrodeposition, electrochemical techniques, corrosion
Metales
Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
topic_facet Ingeniería Química
conversion-coating, electrodeposition, electrochemical techniques, corrosion
Metales
description The chromate conversion treatment is widely used, but it requires highly toxic chromic acid solutions with the consequent effluent disposal and ecological problems. The removal of these toxic chemicals is considered a priority within European Union. The corrosion resistance of three alternative treatments applied on electrogalvanised steel, and immersed in aerated 0.3 M Na2 SO4 solution, pH 10, at 25 °C, was investigated using electrochemical techniques. Their performance was compared with the obtained using the traditional Cr6+-based treatment in the same conditions. The achieved results show that the alternative coatings exhibited discrete protective properties in the sulphate solution. The nitro-cobalt chemical conversion treatment showed similar protective properties than the traditional Cr6+-based treatment, while with the Cr3+-based treatment those were very poor. The phosphate treatment initially performed acceptably but as the time elapsed, its protective properties decreased.
format Articulo
Articulo
author Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
author_facet Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
author_sort Tomachuk, C. R.
title Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
title_short Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
title_full Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
title_fullStr Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
title_full_unstemmed Electrochemical Characterization of Chromate Free Conversion Coatings on Electrogalvanized Steel
title_sort electrochemical characterization of chromate free conversion coatings on electrogalvanized steel
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/75590
work_keys_str_mv AT tomachukcr electrochemicalcharacterizationofchromatefreeconversioncoatingsonelectrogalvanizedsteel
AT elsnerceciliaines electrochemicalcharacterizationofchromatefreeconversioncoatingsonelectrogalvanizedsteel
AT disarlialejandroramon electrochemicalcharacterizationofchromatefreeconversioncoatingsonelectrogalvanizedsteel
bdutipo_str Repositorios
_version_ 1764820484217634819

Ejemplares similares