Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet

Chromate conversion treatments have been widely used due to their excellent corrosion resistance properties; however, their use is increasingly restricted because of the highly toxic chromic acid solutions required, with consequent effluent disposal and ecological problems. The removal of these toxi...

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Autores principales: Di Sarli, Alejandro Ramón, Elsner, Cecilia Inés, Palomino, L.E.M., Tomachuk, Célia Regina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ingeniería en Materiales
Pre-treatments
Conversion coatings
Corrosión
EIS
Electrogalvanised steel
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/119304
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-119304
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería en Materiales
Pre-treatments
Conversion coatings
Corrosión
EIS
Electrogalvanised steel
spellingShingle Ingeniería en Materiales
Pre-treatments
Conversion coatings
Corrosión
EIS
Electrogalvanised steel
Di Sarli, Alejandro Ramón
Elsner, Cecilia Inés
Palomino, L.E.M.
Tomachuk, Célia Regina
Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
topic_facet Ingeniería en Materiales
Pre-treatments
Conversion coatings
Corrosión
EIS
Electrogalvanised steel
description Chromate conversion treatments have been widely used due to their excellent corrosion resistance properties; however, their use is increasingly restricted because of the highly toxic chromic acid solutions required, with consequent effluent disposal and ecological problems. The removal of these toxic chemicals is considered a priority within most of the developed countries. In this work, the corrosion resistance of different alternative pretreatments applied on electrogalvanised steel sheet: 1) Cr(III) and Zr complexes layer, 2) Ce(III) layer, 3) Ce(III)/Ce(IV) double layer, 4) Cr(VI) chromating was investigated, and its results compared with those from the tests performed using bare electrogalvanized steel sheets as a substrate. These samples were exposed to aerated 0.05 mol/L NaCl or 0.1 mol/L Na2SO4 solutions. The electrochemical behavior of samples was studied by electrochemical techniques. For three days of immersion in the solution test, the experimental results have shown that, compared with the Cr(VI) protective properties, the Cr(III) + Zr complex layer presented similar performance. Even though the initial corrosion resistance was offered by the Ce(III) and Ce(VI)/Ce(III) conversion coatings was relatively good, it quickly decreased as a function of the exposure time.
format Articulo
Articulo
author Di Sarli, Alejandro Ramón
Elsner, Cecilia Inés
Palomino, L.E.M.
Tomachuk, Célia Regina
author_facet Di Sarli, Alejandro Ramón
Elsner, Cecilia Inés
Palomino, L.E.M.
Tomachuk, Célia Regina
author_sort Di Sarli, Alejandro Ramón
title Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
title_short Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
title_full Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
title_fullStr Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
title_full_unstemmed Corrosion Performance of Conversion Treatments for Electrogalvanised Steel Sheet
title_sort corrosion performance of conversion treatments for electrogalvanised steel sheet
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/119304
work_keys_str_mv AT disarlialejandroramon corrosionperformanceofconversiontreatmentsforelectrogalvanisedsteelsheet
AT elsnerceciliaines corrosionperformanceofconversiontreatmentsforelectrogalvanisedsteelsheet
AT palominolem corrosionperformanceofconversiontreatmentsforelectrogalvanisedsteelsheet
AT tomachukceliaregina corrosionperformanceofconversiontreatmentsforelectrogalvanisedsteelsheet
bdutipo_str Repositorios
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