TY  - JOUR
AU  - Jegdić, Bore V.
AU  - Živković, Ljiljana
AU  - Popić, Jovan P.
AU  - Rogan, Jelena R.
AU  - Bajat, Jelena B.
AU  - Mišković-Stanković, Vesna B.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1294
AB  - In this study, corrosion protection efficiency of undoped epoxy and epoxy coating doped with cerium on aluminum alloy AA6060 is evaluated over prolonged exposure to 3wt% NaCl solution by electrochemical impedance spectroscopy (EIS). Different amounts of Ce(NO3)(3) are added into the epoxy suspension used for the cataphoretic deposition. Suspension stability is characterized by zeta potential and particle size values. Water content and thermal stability of the coatings were determined by thermogravimetric analysis. Insufficient corrosion stability, very close to that of undoped epoxy, is revealed for the coating with 1mM Ce. Higher cerium doping contributes to a significant increase in corrosion stability (2-3 orders of magnitude greater charge-transfer resistance). Epoxy coating doped with 5mM Ce displays a pronounced self-healing ability and the best corrosion protection and adhesion, owing to evenly distributed cerium precipitates on the aluminum surface. In the case of 10mM Ce-doped coating, the formation of Ce clusters and higher porosity causes a certain lowering of the protective ability. EIS measurements on epoxy coating with artificial defect confirm these findings.
T2  - Materials and Corrosion (Werkstoffe und Korrosion)
T1  - Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy
VL  - 67
IS  - 11
SP  - 1173
EP  - 1184
DO  - 10.1002/maco.201608827
ER  - 

@article{
author = "Jegdić, Bore V. and Živković, Ljiljana and Popić, Jovan P. and Rogan, Jelena R. and Bajat, Jelena B. and Mišković-Stanković, Vesna B.",
year = "2016",
abstract = "In this study, corrosion protection efficiency of undoped epoxy and epoxy coating doped with cerium on aluminum alloy AA6060 is evaluated over prolonged exposure to 3wt% NaCl solution by electrochemical impedance spectroscopy (EIS). Different amounts of Ce(NO3)(3) are added into the epoxy suspension used for the cataphoretic deposition. Suspension stability is characterized by zeta potential and particle size values. Water content and thermal stability of the coatings were determined by thermogravimetric analysis. Insufficient corrosion stability, very close to that of undoped epoxy, is revealed for the coating with 1mM Ce. Higher cerium doping contributes to a significant increase in corrosion stability (2-3 orders of magnitude greater charge-transfer resistance). Epoxy coating doped with 5mM Ce displays a pronounced self-healing ability and the best corrosion protection and adhesion, owing to evenly distributed cerium precipitates on the aluminum surface. In the case of 10mM Ce-doped coating, the formation of Ce clusters and higher porosity causes a certain lowering of the protective ability. EIS measurements on epoxy coating with artificial defect confirm these findings.",
journal = "Materials and Corrosion (Werkstoffe und Korrosion)",
title = "Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy",
volume = "67",
number = "11",
pages = "1173-1184",
doi = "10.1002/maco.201608827"
}

Jegdić, B. V., Živković, L., Popić, J. P., Rogan, J. R., Bajat, J. B.,& Mišković-Stanković, V. B.. (2016). Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy. in Materials and Corrosion (Werkstoffe und Korrosion), 67(11), 1173-1184.
https://doi.org/10.1002/maco.201608827

Jegdić BV, Živković L, Popić JP, Rogan JR, Bajat JB, Mišković-Stanković VB. Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy. in Materials and Corrosion (Werkstoffe und Korrosion). 2016;67(11):1173-1184.
doi:10.1002/maco.201608827 .

Jegdić, Bore V., Živković, Ljiljana, Popić, Jovan P., Rogan, Jelena R., Bajat, Jelena B., Mišković-Stanković, Vesna B., "Corrosion stability of cerium-doped cataphoretic epoxy coatings on AA6060 alloy" in Materials and Corrosion (Werkstoffe und Korrosion), 67, no. 11 (2016):1173-1184,
https://doi.org/10.1002/maco.201608827 . .

TY  - JOUR
AU  - Živković, Ljiljana
AU  - Popić, Jovan P.
AU  - Jegdić, Bore V.
AU  - Dohcevic-Mitrovic, Z.
AU  - Bajat, Jelena B.
AU  - Miskovic-Stankovic, V. B.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5902
AB  - Among potential replacements for chromates, cerium-based conversion coatings (CeCCs) have been identified as leading candidates, showing a good promise as environmentally compliant corrosion inhibitors on Al alloys. In this work, CeCCs were synthesized on M6060 by electrolytic deposition (ELD), a well-suited method for the fabrication of films with controllable properties, at low processing temperature and cost. The CeCCs were deposited at room temperature from Ce(NO3)(3) solution, applying different cathodic potentials (-1.1, -1.4 and -1.6 V vs. SCE) for different deposition times between 5 and 20 min. Structural, morphological and compositional properties of the films were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy coupled with energy dispersive spectroscopy. Ceria films were nanostructured, exhibiting a cubic fluorite structure. From corrosion perspective, the quality of CeCCs was evaluated in 0.5 M NaCI solution via electrochemical impedance spectroscopy and linear sweep voltammetry. As shown, the coating corrosion quality is the interplay between deposition potential and deposition time. The highest potential led to highly cracked films of poor adherence, even at the shortest deposition time, which disqualified them from any corrosion protection application. The lowest potential (-1.1 V) produced crack-free coatings, but longer times ( GT = 10 min) were needed to provide the protective layer formation. The best corrosion protection offered CeCCs prepared at -1.4 V. The highest R-p (582 k Omega cm(2)) and the smallest CPE (12.6 . 10(-6) s(n) Omega(-1) cm) were obtained at 20 min deposition time. However, from economical point of view, 10 min deposition is a promising choice. These CeCCs also improved pitting corrosion resistance owing to homogeneous microstructure and sufficient thickness. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Surface and Coatings Technology
T1  - Corrosion study of ceria coatings on AA6060 aluminum alloy obtained by cathodic electrodeposition: Effect of deposition potential
VL  - 240
SP  - 327
EP  - 335
DO  - 10.1016/j.surfcoat.2013.12.048
ER  - 

@article{
author = "Živković, Ljiljana and Popić, Jovan P. and Jegdić, Bore V. and Dohcevic-Mitrovic, Z. and Bajat, Jelena B. and Miskovic-Stankovic, V. B.",
year = "2014",
abstract = "Among potential replacements for chromates, cerium-based conversion coatings (CeCCs) have been identified as leading candidates, showing a good promise as environmentally compliant corrosion inhibitors on Al alloys. In this work, CeCCs were synthesized on M6060 by electrolytic deposition (ELD), a well-suited method for the fabrication of films with controllable properties, at low processing temperature and cost. The CeCCs were deposited at room temperature from Ce(NO3)(3) solution, applying different cathodic potentials (-1.1, -1.4 and -1.6 V vs. SCE) for different deposition times between 5 and 20 min. Structural, morphological and compositional properties of the films were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy coupled with energy dispersive spectroscopy. Ceria films were nanostructured, exhibiting a cubic fluorite structure. From corrosion perspective, the quality of CeCCs was evaluated in 0.5 M NaCI solution via electrochemical impedance spectroscopy and linear sweep voltammetry. As shown, the coating corrosion quality is the interplay between deposition potential and deposition time. The highest potential led to highly cracked films of poor adherence, even at the shortest deposition time, which disqualified them from any corrosion protection application. The lowest potential (-1.1 V) produced crack-free coatings, but longer times ( GT = 10 min) were needed to provide the protective layer formation. The best corrosion protection offered CeCCs prepared at -1.4 V. The highest R-p (582 k Omega cm(2)) and the smallest CPE (12.6 . 10(-6) s(n) Omega(-1) cm) were obtained at 20 min deposition time. However, from economical point of view, 10 min deposition is a promising choice. These CeCCs also improved pitting corrosion resistance owing to homogeneous microstructure and sufficient thickness. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Surface and Coatings Technology",
title = "Corrosion study of ceria coatings on AA6060 aluminum alloy obtained by cathodic electrodeposition: Effect of deposition potential",
volume = "240",
pages = "327-335",
doi = "10.1016/j.surfcoat.2013.12.048"
}

Živković, L., Popić, J. P., Jegdić, B. V., Dohcevic-Mitrovic, Z., Bajat, J. B.,& Miskovic-Stankovic, V. B.. (2014). Corrosion study of ceria coatings on AA6060 aluminum alloy obtained by cathodic electrodeposition: Effect of deposition potential. in Surface and Coatings Technology, 240, 327-335.
https://doi.org/10.1016/j.surfcoat.2013.12.048

Živković L, Popić JP, Jegdić BV, Dohcevic-Mitrovic Z, Bajat JB, Miskovic-Stankovic VB. Corrosion study of ceria coatings on AA6060 aluminum alloy obtained by cathodic electrodeposition: Effect of deposition potential. in Surface and Coatings Technology. 2014;240:327-335.
doi:10.1016/j.surfcoat.2013.12.048 .

Živković, Ljiljana, Popić, Jovan P., Jegdić, Bore V., Dohcevic-Mitrovic, Z., Bajat, Jelena B., Miskovic-Stankovic, V. B., "Corrosion study of ceria coatings on AA6060 aluminum alloy obtained by cathodic electrodeposition: Effect of deposition potential" in Surface and Coatings Technology, 240 (2014):327-335,
https://doi.org/10.1016/j.surfcoat.2013.12.048 . .

TY  - JOUR
AU  - Živković, Ljiljana
AU  - Jegdić, Bore V.
AU  - Popić, Jovan P.
AU  - Bajat, Jelena B.
AU  - Mišković-Stanković, Vesna B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5641
AB  - Cerium-based conversion coatings (CeCCs) are one of the most prospective alternatives to the widely used chromate conversion coatings (CCCs) due to their anticorrosion efficiency, environmentally friendly nature and low cost. In this work, the CeCCs on AA6060 were prepared by immersion into aqueous cerium salt solutions at room temperature, and subsequently post-treated in heated phosphate solution. The effect of counter ion (nitrate and chloride) on the coating properties was studied testing CeCCs as sole or conversion layers for the top polyester coating. Since the 60 mu m thick polyester coating was applied, an artificial defect of 0.8 mm hole was introduced to faster assess the differences between pretreatments. The system with CCC pretreatment was used as reference. Corrosion properties were investigated in 0.5 M NaCl solution by electrochemical impedance spectroscopy while the adhesion strength was measured by NMPR (N-methyl-2-pyrrolidone) and pull-off tests. As shown, the post-treated chloride-based CeCC offered better protection than crack-free thin nitrate-based CeCC, when used as sole coatings. On the other hand, it was brought to evidence that in combination with top powder polyester coating, the CeCC deposited from nitrate solution exhibited better protection compared to protective system pretreated with chloride-based one. Excellent polyester coating adhesion was found independently on aluminium surface pretreatment. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Progress in Organic Coatings
T1  - The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060
VL  - 76
IS  - 10
SP  - 1387
EP  - 1395
DO  - 10.1016/j.porgcoat.2013.04.017
ER  - 

@article{
author = "Živković, Ljiljana and Jegdić, Bore V. and Popić, Jovan P. and Bajat, Jelena B. and Mišković-Stanković, Vesna B.",
year = "2013",
abstract = "Cerium-based conversion coatings (CeCCs) are one of the most prospective alternatives to the widely used chromate conversion coatings (CCCs) due to their anticorrosion efficiency, environmentally friendly nature and low cost. In this work, the CeCCs on AA6060 were prepared by immersion into aqueous cerium salt solutions at room temperature, and subsequently post-treated in heated phosphate solution. The effect of counter ion (nitrate and chloride) on the coating properties was studied testing CeCCs as sole or conversion layers for the top polyester coating. Since the 60 mu m thick polyester coating was applied, an artificial defect of 0.8 mm hole was introduced to faster assess the differences between pretreatments. The system with CCC pretreatment was used as reference. Corrosion properties were investigated in 0.5 M NaCl solution by electrochemical impedance spectroscopy while the adhesion strength was measured by NMPR (N-methyl-2-pyrrolidone) and pull-off tests. As shown, the post-treated chloride-based CeCC offered better protection than crack-free thin nitrate-based CeCC, when used as sole coatings. On the other hand, it was brought to evidence that in combination with top powder polyester coating, the CeCC deposited from nitrate solution exhibited better protection compared to protective system pretreated with chloride-based one. Excellent polyester coating adhesion was found independently on aluminium surface pretreatment. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Progress in Organic Coatings",
title = "The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060",
volume = "76",
number = "10",
pages = "1387-1395",
doi = "10.1016/j.porgcoat.2013.04.017"
}

Živković, L., Jegdić, B. V., Popić, J. P., Bajat, J. B.,& Mišković-Stanković, V. B.. (2013). The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060. in Progress in Organic Coatings, 76(10), 1387-1395.
https://doi.org/10.1016/j.porgcoat.2013.04.017

Živković L, Jegdić BV, Popić JP, Bajat JB, Mišković-Stanković VB. The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060. in Progress in Organic Coatings. 2013;76(10):1387-1395.
doi:10.1016/j.porgcoat.2013.04.017 .

Živković, Ljiljana, Jegdić, Bore V., Popić, Jovan P., Bajat, Jelena B., Mišković-Stanković, Vesna B., "The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060" in Progress in Organic Coatings, 76, no. 10 (2013):1387-1395,
https://doi.org/10.1016/j.porgcoat.2013.04.017 . .