Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/24660
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Preparation and characterization of cerium doped silica sol–gel coatings on glass and aluminum substrates |
Autor: | Aparicio, Mario CSIC ORCID ; Durán, Alicia CSIC ORCID ; Pepe, Annalisa; Ceré, S. | Fecha de publicación: | 2004 | Editor: | Elsevier | Citación: | Journal of Non-Crystalline Solids 348: 162–171 (2004) | Resumen: | Chromates are among the most common substances used as corrosion inhibitors. However, these compounds are highly toxic, and an intense effort is being undertaken to replace them. Cerium compounds seem to fulfil the basic requirements for consideration as alternative corrosion inhibitors. The aim of this work was to study the effect of the incorporation of cerium ions in silica sol–gel coatings on aluminum alloys as potential replacement of chromate treatments. The main idea was to combine the barrier effect of silica coatings with the corrosion inhibitor effect of the cerium inside the coatings. Thin (below1 lm for a single layer) and transparent cerium doped silica sol–gel coatings were prepared by dipping 3005 aluminum alloys in sol–gel solutions. Ultra-violet–visible spectra (UV–vis) showthat cerium ions, Ce3+ and Ce4+, always are present in the coatings, independently of the cerium salt or firing atmosphere used. Active protection with single and two layer coatings prepared with Ce (IV) salt seems to improve corrosion protection of the coated aluminum while coatings prepared with Ce(III) salt only entails a protection when applied as a two layer, possibly due to sealing of pre-existent defects in the first layer. The improvement of active protection with immersion time would imply that corrosion is inhibited by cerium ions that migrate through the coating to the site of the attack (a defect in the coatings) and then react to passivate the site. | Versión del editor: | http://dx.doi.org/doi:10.1016/j.jnoncrysol.2004.08.141 | URI: | http://hdl.handle.net/10261/24660 | DOI: | 10.1016/j.jnoncrysol.2004.08.141 |
Aparece en las colecciones: | (ICV) Artículos |
Mostrar el registro completo
CORE Recommender
SCOPUSTM
Citations
150
checked on 16-abr-2024
WEB OF SCIENCETM
Citations
135
checked on 20-feb-2024
Page view(s)
436
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.