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Cerium oxide as conversion coating for the corrosion protection of aluminum

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2013
105-412-1-PB.pdf (1.321Mb)
Authors
Gulicovski, Jelena
Bajat, Jelena
Mišković-Stanković, Vesna
Jokić, Bojan
Panić, Vladimir
Milonjić, Slobodan
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Abstract
CeO2 coatings were formed on the aluminum after Al surface preparation, by dripping the ceria sol, pre­viously prepared by forced hydrolysis of Ce(NO3)4. The anticorrosive properties of ceria coatings were investigated by the electrochemical impedance spectroscopy (EIS) during the exposure to 0.03% NaCl. The morphology of the coa­tings was examined by the scanning electron microscopy (SEM). EIS data indicated considerably larger corrosion resistance of CeO2-coated aluminum than for bare Al. The corrosion processes on Al below CeO2 coating are sub­jected to more pronounced diffusion limitations in com­parison to the processes below passive aluminum oxide film, as the consequence of the formation of highly com­pact protective coating. The results show that the deposi­tion of ceria coatings is an effective way to improve corro­sion resistance for aluminum.
Keywords:
Ceria / Coatings / Corrosion / Microstructure
Source:
Journal of Electrochemical Science and Engineering, 2013, 3, 4, 151-156
Publisher:
  • International Association of Physical Chemists (IAPC)
Projects:
  • Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-45012)

DOI: 10.5599/jese.2013.0037

ISSN: 18479286

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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/3442
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