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Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent

Impedansni odgovor aluminijuma sa zaštitnom prevlakom oksida cerijuma tokom izlaganja hloridnoj korozionoj sredini

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2016
1869.pdf (806.2Kb)
Authors
Košević, Milica
Panić, Vladimir
Bajat, Jelena
Mišković-Stanković, Vesna
Article (Published version)
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Abstract
Electrochemical impedance characteristics of bare Al and Al with CeO2 coating prepared sol-gel procedure from the ceria sol are investigated. The corrosion behavior is monitored during the exposure to 3 wt. % NaCl aqueous solution. Experimental data are fitted to various equivalent electrical circuits with special attention to inductive features. Equivalent electrical circuits involving inductivity represent impedance response equally well as the ones without inductivity, although the parameter values gained from the former correspond better to the proposed model of physicochemical changes during corrosion of investigated samples.
Korozione karakteristike aluminijuma i aluminijuma na koji je naneta prevlaka oksida cerijuma sol-gel postupkom ispitivane su primenom spektroskopije elektrohemijske impedancije tokom izlaganja u vodenom rastvoru 3 mas. % NaCl. Dobijeni podaci analizirani su ekvivalentnim električnim kolima različite konfiguracije uz posebnu diskusiju koja se odnosi na pojavu induktivnog ponašanja. Ekvivalentna kola sa induktivnim elementom i bez njega podjednako dobro opisuju impedansne odgovore, mada vrednosti parametara kola u kojima je uključena induktivnost više odgovaraju predloženom modelu fizičko-hemijskih promena tokom procesa korozije ispitivanih sistema.
Keywords:
conversion coatings / Al corrosion / reversed gelation / AlO(OH) fiber network ascorrosion product / konverzione prevlake / korozija aluminijuma / reversno geliranje prevlake / AlO(OH) vlakna kao proizvod korozije
Source:
Zaštita materijala, 2016, 57, 2, 305-313
Publisher:
  • Belgrade, Serbia : Engineering Society for Corrosion
Projects:
  • Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
  • New approach in designing materials for energy conversion and energy storage systems (RS-172060)

DOI: 10.5937/ZasMat1602305k

ISSN: 0351-9465

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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1871
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