Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media

The corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Tomachuk, C. R., Elsner, Cecilia Inés, Di Sarli, Alejandro Ramón, Ferraz, O. B.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/81946
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-81946
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
spellingShingle Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
topic_facet Química
Interfaces
Corrosion
Electrochemical properties
Coatings
SEM
description The corrosion resistance of pure zinc coatings can be improved through the application of suitable chemical passivation treatments. Hexavalent chromium compounds have widely been used to formulate conversion layers providing better anticorrosive protection as well as anchorage properties to painting systems. However, taking into account that they are produced using hazardous chemical compounds, the development of alternative and “green” technologies with equivalent protective performance is a paramount purpose of many R&D laboratories working around the world. In the present paper, the corrosion behavior of zinc coatings obtained from free-cyanide alkaline baths and later subjected to a Cr3+ based passivation treatment, with and without a sealing treatment, was studied. The experimental work involved electrochemical impedance spectroscopy measurements in 0.5M NaCl solution, surface microstructural and morphological characterization by electronic microscopy as well as chemical analysis by EDXS. The salt spray test was also performed. The analysis and interpretation of all the data coming from this battery of tests allowed inferring that both the Cr3+ based conversion treatment + adequate sealer presented a good corrosion resistance and, therefore, they could be used as neither a polluting nor toxic alternative to the traditional chromate coatings.
format Articulo
Articulo
author Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
author_facet Tomachuk, C. R.
Elsner, Cecilia Inés
Di Sarli, Alejandro Ramón
Ferraz, O. B.
author_sort Tomachuk, C. R.
title Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_short Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_full Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_fullStr Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_full_unstemmed Corrosion Resistance of Cr(III) Conversion Treatments Applied on Electrogalvanised Steel and Subjected to Chloride Containing Media
title_sort corrosion resistance of cr(iii) conversion treatments applied on electrogalvanised steel and subjected to chloride containing media
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/81946
work_keys_str_mv AT tomachukcr corrosionresistanceofcriiiconversiontreatmentsappliedonelectrogalvanisedsteelandsubjectedtochloridecontainingmedia
AT elsnerceciliaines corrosionresistanceofcriiiconversiontreatmentsappliedonelectrogalvanisedsteelandsubjectedtochloridecontainingmedia
AT disarlialejandroramon corrosionresistanceofcriiiconversiontreatmentsappliedonelectrogalvanisedsteelandsubjectedtochloridecontainingmedia
AT ferrazob corrosionresistanceofcriiiconversiontreatmentsappliedonelectrogalvanisedsteelandsubjectedtochloridecontainingmedia
bdutipo_str Repositorios
_version_ 1764820488543010816

Ejemplares similares