TY  - JOUR
AU  - Živković, Ljiljana
AU  - Bajat, Jelena B.
AU  - Popić, Jovan P.
AU  - Jegdić, Bore V.
AU  - Stevanović, Sanja
AU  - Mišković-Stanković, Vesna B.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/384
AB  - Ce-based conversion coatings (CeCCs) are a promising alternative to toxic chromate coatings on the metal substrates. In this work the CeCCs were electrodeposited on aluminium alloy AA6060 from aqueous solution of Ce(NO3)(3) at different potentials (-0.95 V, -1.2 V and -1.4V). Effect of deposition potential and post-treatment in the phosphate solution on morphology and protective properties of CeCCs with top cataphoretic epoxy coating was studied. To assess the differences between the protective systems, originating from the different CeCCs pre-treatments, electrochemical impedance spectroscopy (EIS), polarization measurements, AFM and SEM/EDS analysis were used. The EIS study was undertaken to follow the evolution of corrosion behaviour of epoxy coating/CeCCs protective systems over prolonged time of exposure to the chloride environment (3 wt.% NaCl). Results suggest significantly improved corrosion stability of epoxy coating on AA6060 with as-deposited CeCCs sub-layers with respect to the same epoxy coatings with phosphate post-treated CeCCs. The far best protective properties, i.e., the greatest value of pore resistance and the lowest value of corrosion current density were provided by the epoxy coating/CeCC protective system with CeCC deposited at -1.2V and without post-treatment. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Progress in Organic Coatings
T1  - Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment
VL  - 79
SP  - 43
EP  - 52
DO  - 10.1016/j.porgcoat.2014.10.014
ER  - 

@article{
author = "Živković, Ljiljana and Bajat, Jelena B. and Popić, Jovan P. and Jegdić, Bore V. and Stevanović, Sanja and Mišković-Stanković, Vesna B.",
year = "2015",
abstract = "Ce-based conversion coatings (CeCCs) are a promising alternative to toxic chromate coatings on the metal substrates. In this work the CeCCs were electrodeposited on aluminium alloy AA6060 from aqueous solution of Ce(NO3)(3) at different potentials (-0.95 V, -1.2 V and -1.4V). Effect of deposition potential and post-treatment in the phosphate solution on morphology and protective properties of CeCCs with top cataphoretic epoxy coating was studied. To assess the differences between the protective systems, originating from the different CeCCs pre-treatments, electrochemical impedance spectroscopy (EIS), polarization measurements, AFM and SEM/EDS analysis were used. The EIS study was undertaken to follow the evolution of corrosion behaviour of epoxy coating/CeCCs protective systems over prolonged time of exposure to the chloride environment (3 wt.% NaCl). Results suggest significantly improved corrosion stability of epoxy coating on AA6060 with as-deposited CeCCs sub-layers with respect to the same epoxy coatings with phosphate post-treated CeCCs. The far best protective properties, i.e., the greatest value of pore resistance and the lowest value of corrosion current density were provided by the epoxy coating/CeCC protective system with CeCC deposited at -1.2V and without post-treatment. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Progress in Organic Coatings",
title = "Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment",
volume = "79",
pages = "43-52",
doi = "10.1016/j.porgcoat.2014.10.014"
}

Živković, L., Bajat, J. B., Popić, J. P., Jegdić, B. V., Stevanović, S.,& Mišković-Stanković, V. B.. (2015). Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment. in Progress in Organic Coatings, 79, 43-52.
https://doi.org/10.1016/j.porgcoat.2014.10.014

Živković L, Bajat JB, Popić JP, Jegdić BV, Stevanović S, Mišković-Stanković VB. Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment. in Progress in Organic Coatings. 2015;79:43-52.
doi:10.1016/j.porgcoat.2014.10.014 .

Živković, Ljiljana, Bajat, Jelena B., Popić, Jovan P., Jegdić, Bore V., Stevanović, Sanja, Mišković-Stanković, Vesna B., "Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment" in Progress in Organic Coatings, 79 (2015):43-52,
https://doi.org/10.1016/j.porgcoat.2014.10.014 . .

TY  - JOUR
AU  - Popić, Jovan P.
AU  - Jegdić, Bore V.
AU  - Bajat, Jelena B.
AU  - Mitrić, Miodrag
AU  - Mišković-Stanković, Vesna B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5296
AB  - In this study, the effect of deposition time and concentration of NaNO2 in the phosphate bath on the surface morphology of iron-phosphate coatings on low carbon steel was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The composition of iron-phosphate coatings was determined using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD), while surface coverage was evaluated by the voltammetric anodic dissolution (VAD) technique in the borate solution. The addition of NaNO2 to the phosphate bath significantly increased the surface coverage since better packed crystals of smaller size, which favour the phosphate nucleation, were obtained. It was also shown that prolonged deposition time increased the surface coverage, coating roughness and crystal size in the lateral direction, altering also the crystal shape from large platelets non-uniformly distributed on the steel surface during the initial time to better-packed laminated and needle-like structures during prolonged exposure.
T2  - Journal of the Serbian Chemical Society
T1  - Determination of surface coverage of iron-phosphate coatings on steel using the voltammetric anodic dissolution technique
VL  - 78
IS  - 1
SP  - 101
EP  - 114
DO  - 10.2298/JSC120706096P
ER  - 

@article{
author = "Popić, Jovan P. and Jegdić, Bore V. and Bajat, Jelena B. and Mitrić, Miodrag and Mišković-Stanković, Vesna B.",
year = "2013",
abstract = "In this study, the effect of deposition time and concentration of NaNO2 in the phosphate bath on the surface morphology of iron-phosphate coatings on low carbon steel was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The composition of iron-phosphate coatings was determined using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD), while surface coverage was evaluated by the voltammetric anodic dissolution (VAD) technique in the borate solution. The addition of NaNO2 to the phosphate bath significantly increased the surface coverage since better packed crystals of smaller size, which favour the phosphate nucleation, were obtained. It was also shown that prolonged deposition time increased the surface coverage, coating roughness and crystal size in the lateral direction, altering also the crystal shape from large platelets non-uniformly distributed on the steel surface during the initial time to better-packed laminated and needle-like structures during prolonged exposure.",
journal = "Journal of the Serbian Chemical Society",
title = "Determination of surface coverage of iron-phosphate coatings on steel using the voltammetric anodic dissolution technique",
volume = "78",
number = "1",
pages = "101-114",
doi = "10.2298/JSC120706096P"
}

Popić, J. P., Jegdić, B. V., Bajat, J. B., Mitrić, M.,& Mišković-Stanković, V. B.. (2013). Determination of surface coverage of iron-phosphate coatings on steel using the voltammetric anodic dissolution technique. in Journal of the Serbian Chemical Society, 78(1), 101-114.
https://doi.org/10.2298/JSC120706096P

Popić JP, Jegdić BV, Bajat JB, Mitrić M, Mišković-Stanković VB. Determination of surface coverage of iron-phosphate coatings on steel using the voltammetric anodic dissolution technique. in Journal of the Serbian Chemical Society. 2013;78(1):101-114.
doi:10.2298/JSC120706096P .

Popić, Jovan P., Jegdić, Bore V., Bajat, Jelena B., Mitrić, Miodrag, Mišković-Stanković, Vesna B., "Determination of surface coverage of iron-phosphate coatings on steel using the voltammetric anodic dissolution technique" in Journal of the Serbian Chemical Society, 78, no. 1 (2013):101-114,
https://doi.org/10.2298/JSC120706096P . .

TY  - JOUR
AU  - Jegdić, Bore V.
AU  - Živković, Ljiljana
AU  - Popić, Jovan P.
AU  - Bajat, Jelena B.
AU  - Mišković-Stanković, Vesna B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5616
AB  - Dip-immersion is a simple and cost-effective method for the preparation of Ce-based conversion coatings (CeCCs), a promising alternative to toxic chromate coatings, on metal substrates. In this work, CeCCs were prepared on Al-alloy AA6060 from an aqueous solution of cerium chloride at room temperature. The effect of immersion time and post-treatment in phosphate solution on the microstructure and corrosion properties of the coatings was studied. The longer the immersion time was, the thicker but more non-homogeneous and cracked were the CeCCs. The post-treatment contributed to a sealing of the cracks, as proven by an increase in the corrosion resistance compared with the as-deposited coatings. The CeCCs prepared at longer deposition times and post-treated showed much better corrosion protection than those prepared at shorter deposition, times. A detailed electrochemical impedance spectroscopy (EIS) study was undertaken to follow the evolution of the corrosion behaviour of the CeCCs with time of exposure to an aggressive chloride environment (3.5 % NaCl). For the sake of comparison, the EIS properties of bare AA6060 were also investigated. Linear voltammetry was performed to complete the study. The results confirmed the formation of protective CeCCs on the surface of AA6060. However, even CeCCs prepared at longer deposition times and post-treated provided short term protection in the aggressive environment, due to the small thickness of the coating.
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical methods for corrosion testing of Ce-based coatings prepared on AA6060 alloy by the dip immersion method
VL  - 78
IS  - 7
SP  - 997
EP  - 1011
DO  - 10.2298/JSC121212009J
ER  - 

@article{
author = "Jegdić, Bore V. and Živković, Ljiljana and Popić, Jovan P. and Bajat, Jelena B. and Mišković-Stanković, Vesna B.",
year = "2013",
abstract = "Dip-immersion is a simple and cost-effective method for the preparation of Ce-based conversion coatings (CeCCs), a promising alternative to toxic chromate coatings, on metal substrates. In this work, CeCCs were prepared on Al-alloy AA6060 from an aqueous solution of cerium chloride at room temperature. The effect of immersion time and post-treatment in phosphate solution on the microstructure and corrosion properties of the coatings was studied. The longer the immersion time was, the thicker but more non-homogeneous and cracked were the CeCCs. The post-treatment contributed to a sealing of the cracks, as proven by an increase in the corrosion resistance compared with the as-deposited coatings. The CeCCs prepared at longer deposition times and post-treated showed much better corrosion protection than those prepared at shorter deposition, times. A detailed electrochemical impedance spectroscopy (EIS) study was undertaken to follow the evolution of the corrosion behaviour of the CeCCs with time of exposure to an aggressive chloride environment (3.5 % NaCl). For the sake of comparison, the EIS properties of bare AA6060 were also investigated. Linear voltammetry was performed to complete the study. The results confirmed the formation of protective CeCCs on the surface of AA6060. However, even CeCCs prepared at longer deposition times and post-treated provided short term protection in the aggressive environment, due to the small thickness of the coating.",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical methods for corrosion testing of Ce-based coatings prepared on AA6060 alloy by the dip immersion method",
volume = "78",
number = "7",
pages = "997-1011",
doi = "10.2298/JSC121212009J"
}

Jegdić, B. V., Živković, L., Popić, J. P., Bajat, J. B.,& Mišković-Stanković, V. B.. (2013). Electrochemical methods for corrosion testing of Ce-based coatings prepared on AA6060 alloy by the dip immersion method. in Journal of the Serbian Chemical Society, 78(7), 997-1011.
https://doi.org/10.2298/JSC121212009J

Jegdić BV, Živković L, Popić JP, Bajat JB, Mišković-Stanković VB. Electrochemical methods for corrosion testing of Ce-based coatings prepared on AA6060 alloy by the dip immersion method. in Journal of the Serbian Chemical Society. 2013;78(7):997-1011.
doi:10.2298/JSC121212009J .

Jegdić, Bore V., Živković, Ljiljana, Popić, Jovan P., Bajat, Jelena B., Mišković-Stanković, Vesna B., "Electrochemical methods for corrosion testing of Ce-based coatings prepared on AA6060 alloy by the dip immersion method" in Journal of the Serbian Chemical Society, 78, no. 7 (2013):997-1011,
https://doi.org/10.2298/JSC121212009J . .