Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings
Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morp...
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doaj-ee320c63d3ab4f6bbd196bfbeda300fb2021-04-25T23:02:25ZengMDPI AGMetals2075-47012021-04-011170470410.3390/met11050704Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite CoatingsMarija Riđošić0Nebojša D. Nikolić1Asier Salicio-Paz2Eva García-Lecina3Ljiljana S. Živković4Jelena B. Bajat5Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, SerbiaDepartment of Electrochemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, SerbiaCIDETEC Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, SpainCIDETEC Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, SpainVinča Institute of Nuclear Science, University of Belgrade, 11000 Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, SerbiaElectrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO<sub>2 </sub>sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO<sub>2</sub> (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO<sub>2</sub> (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment.https://www.mdpi.com/2075-4701/11/5/704electrodepositionultrasoundcomposite coatingsself-healingcorrosionscanning Kelvin probe |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marija Riđošić Nebojša D. Nikolić Asier Salicio-Paz Eva García-Lecina Ljiljana S. Živković Jelena B. Bajat |
spellingShingle |
Marija Riđošić Nebojša D. Nikolić Asier Salicio-Paz Eva García-Lecina Ljiljana S. Živković Jelena B. Bajat Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings Metals electrodeposition ultrasound composite coatings self-healing corrosion scanning Kelvin probe |
author_facet |
Marija Riđošić Nebojša D. Nikolić Asier Salicio-Paz Eva García-Lecina Ljiljana S. Živković Jelena B. Bajat |
author_sort |
Marija Riđošić |
title |
Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings |
title_short |
Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings |
title_full |
Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings |
title_fullStr |
Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings |
title_full_unstemmed |
Zn-Co-CeO<sub>2 </sub>vs. Zn-Co Coatings: Effect of CeO<sub>2 </sub>Sol in the Enhancement of the Corrosion Performance of Electrodeposited Composite Coatings |
title_sort |
zn-co-ceo<sub>2 </sub>vs. zn-co coatings: effect of ceo<sub>2 </sub>sol in the enhancement of the corrosion performance of electrodeposited composite coatings |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2021-04-01 |
description |
Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal of this research. Electrodeposited composite coatings were compared to pure Zn-Co coatings obtained under the same conditions. The effect of two ceria sources, powder and home-made sol, on the morphology and corrosion resistance of the composite coatings was determined. During the electrodeposition process the plating solution was successfully agitated in an ultrasound bath. The source of the particles was found to influence the stability and dispersity of plating solutions. The application of ceria sol resulted in an increase of the ceria content in the resulting coating and favored the refinement from cauliflower-like morphology (Zn-Co) to uniform and compact coral-like structure (Zn-Co-CeO<sub>2 </sub>sol). The corrosion resistance of the composite coatings was enhanced compared to bare Zn-Co as evidenced by electrochemical impedance spectroscopy and scanning Kelvin probe results. Zn-Co doped with ceria particles originating from ceria sol exhibited superior corrosion resistance compared to Zn-Co-CeO<sub>2</sub> (powder) coatings. The self-healing rate of artificial defect was calculated based on measured Volta potential difference for which Zn-Co-CeO<sub>2</sub> (sol) coatings exhibited a self-healing rate of 73.28% in a chloride-rich environment. |
topic |
electrodeposition ultrasound composite coatings self-healing corrosion scanning Kelvin probe |
url |
https://www.mdpi.com/2075-4701/11/5/704 |
work_keys_str_mv |
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