TY  - JOUR
AU  - Stevanović, Sanja
AU  - Lekka, Maria
AU  - Lanzutti, Alex
AU  - Tasić, Nikola
AU  - Živković, Ljiljana
AU  - Fedrizzi, Lorenzo
AU  - Bajat, Jelena
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4542
AB  - Cerium-based conversion coatings have emerged as promising green alternatives to the harmful chromium-based ones, but the mechanism of corrosive protection still remains a subject of academic and industrial research. This study focuses at small scale phenomena of corrosion inhibition imparted by ceria (CeO2) to AA7075. Ceria nanoparticles were deposited from diluted and concentrated CeO2 sols by immersion. A multi-analytical approach, combining Atomic Force microscopy (AFM), Scanning Kelvin Probe Force Microscopy, Glow Discharge Optical Emission Spectroscopy, open circuit potential and electrochemical impedance spectroscopy was employed. Deposition of ceria films led to deactivation of cathodic sites, i.e. decreased Volta potential difference, resulting in increased corrosion inhibition. In situ AFM real-time monitoring revealed that during exposure to NaCl electrolyte, the changes in size of deposited ceria aggregates occurred: nanoparticles disintegrated/desorbed and re-deposited at the coating surface. The process was found to be dynamic in nature. Small particles size and inherent reactivity are believed to accelerate this phenomenon. Due to the greater CeO2 reservoir, this phenomenon was more pronounced with a thicker film, imparting longer term protection.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Real-Time AFM and Impedance Corrosion Monitoring of Environmentally Friendly Ceria Films on AA7075
IS  - 10
VL  - 167
DO  - 10.1149/1945-7111/ab98af
ER  - 

@article{
author = "Stevanović, Sanja and Lekka, Maria and Lanzutti, Alex and Tasić, Nikola and Živković, Ljiljana and Fedrizzi, Lorenzo and Bajat, Jelena",
year = "2020",
abstract = "Cerium-based conversion coatings have emerged as promising green alternatives to the harmful chromium-based ones, but the mechanism of corrosive protection still remains a subject of academic and industrial research. This study focuses at small scale phenomena of corrosion inhibition imparted by ceria (CeO2) to AA7075. Ceria nanoparticles were deposited from diluted and concentrated CeO2 sols by immersion. A multi-analytical approach, combining Atomic Force microscopy (AFM), Scanning Kelvin Probe Force Microscopy, Glow Discharge Optical Emission Spectroscopy, open circuit potential and electrochemical impedance spectroscopy was employed. Deposition of ceria films led to deactivation of cathodic sites, i.e. decreased Volta potential difference, resulting in increased corrosion inhibition. In situ AFM real-time monitoring revealed that during exposure to NaCl electrolyte, the changes in size of deposited ceria aggregates occurred: nanoparticles disintegrated/desorbed and re-deposited at the coating surface. The process was found to be dynamic in nature. Small particles size and inherent reactivity are believed to accelerate this phenomenon. Due to the greater CeO2 reservoir, this phenomenon was more pronounced with a thicker film, imparting longer term protection.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Real-Time AFM and Impedance Corrosion Monitoring of Environmentally Friendly Ceria Films on AA7075",
number = "10",
volume = "167",
doi = "10.1149/1945-7111/ab98af"
}

Stevanović, S., Lekka, M., Lanzutti, A., Tasić, N., Živković, L., Fedrizzi, L.,& Bajat, J.. (2020). Real-Time AFM and Impedance Corrosion Monitoring of Environmentally Friendly Ceria Films on AA7075. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 167(10).
https://doi.org/10.1149/1945-7111/ab98af

Stevanović S, Lekka M, Lanzutti A, Tasić N, Živković L, Fedrizzi L, Bajat J. Real-Time AFM and Impedance Corrosion Monitoring of Environmentally Friendly Ceria Films on AA7075. in Journal of the Electrochemical Society. 2020;167(10).
doi:10.1149/1945-7111/ab98af .

Stevanović, Sanja, Lekka, Maria, Lanzutti, Alex, Tasić, Nikola, Živković, Ljiljana, Fedrizzi, Lorenzo, Bajat, Jelena, "Real-Time AFM and Impedance Corrosion Monitoring of Environmentally Friendly Ceria Films on AA7075" in Journal of the Electrochemical Society, 167, no. 10 (2020),
https://doi.org/10.1149/1945-7111/ab98af . .

TY  - JOUR
AU  - Bucko, M.
AU  - Culliton, D.
AU  - Betts, A. J.
AU  - Bajat, Jelena
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3700
AB  - Electrochemical and microscopic techniques were used for the characterisation of Zn-Mn coatings electrodeposited from choline chloride-urea deep eutectic solvent. Cyclic voltammograms show that there was no discernible Mn reduction peak when only Mn2+ was present in DES solution. The distinct Mn peak developed only upon addition of Zn2+ to the solution, probably due to previous Zn nucleation on the steel substrate. It was found that 22-27 wt-% Mn deposited at current densities of 3-8 mA cm(-2), amounts significantly higher than those obtained from aqueous electrolytes. Since higher deposition current densities resulted in the formation of a porous surface consisting of clusters of nodular crystallites, the optimal deposition c.d was determined to be 3 mA cm(-2).
PB  - Taylor & Francis Ltd, Abingdon
T2  - Transactions of the Institute of Metal Finishing
T1  - The electrochemical deposition of Zn-Mn coating from choline chloride-urea deep eutectic solvent
EP  - 64
IS  - 1
SP  - 60
VL  - 95
DO  - 10.1080/00202967.2017.1255412
ER  - 

@article{
author = "Bucko, M. and Culliton, D. and Betts, A. J. and Bajat, Jelena",
year = "2017",
abstract = "Electrochemical and microscopic techniques were used for the characterisation of Zn-Mn coatings electrodeposited from choline chloride-urea deep eutectic solvent. Cyclic voltammograms show that there was no discernible Mn reduction peak when only Mn2+ was present in DES solution. The distinct Mn peak developed only upon addition of Zn2+ to the solution, probably due to previous Zn nucleation on the steel substrate. It was found that 22-27 wt-% Mn deposited at current densities of 3-8 mA cm(-2), amounts significantly higher than those obtained from aqueous electrolytes. Since higher deposition current densities resulted in the formation of a porous surface consisting of clusters of nodular crystallites, the optimal deposition c.d was determined to be 3 mA cm(-2).",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Transactions of the Institute of Metal Finishing",
title = "The electrochemical deposition of Zn-Mn coating from choline chloride-urea deep eutectic solvent",
pages = "64-60",
number = "1",
volume = "95",
doi = "10.1080/00202967.2017.1255412"
}

Bucko, M., Culliton, D., Betts, A. J.,& Bajat, J.. (2017). The electrochemical deposition of Zn-Mn coating from choline chloride-urea deep eutectic solvent. in Transactions of the Institute of Metal Finishing
Taylor & Francis Ltd, Abingdon., 95(1), 60-64.
https://doi.org/10.1080/00202967.2017.1255412

Bucko M, Culliton D, Betts AJ, Bajat J. The electrochemical deposition of Zn-Mn coating from choline chloride-urea deep eutectic solvent. in Transactions of the Institute of Metal Finishing. 2017;95(1):60-64.
doi:10.1080/00202967.2017.1255412 .

Bucko, M., Culliton, D., Betts, A. J., Bajat, Jelena, "The electrochemical deposition of Zn-Mn coating from choline chloride-urea deep eutectic solvent" in Transactions of the Institute of Metal Finishing, 95, no. 1 (2017):60-64,
https://doi.org/10.1080/00202967.2017.1255412 . .