Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment
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Živković, LjiljanaBajat, Jelena B.
Popić, Jovan P.
Jegdić, Bore V.
Stevanović, Sanja
Mišković-Stanković, Vesna B.
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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.
Keywords:
Ce-based coating / Phosphate post-treatment / Epoxy coating / Electrodeposition / Corrosion / EISSource:
Progress in Organic Coatings, 2015, 79, 43-52Funding / projects:
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
DOI: 10.1016/j.porgcoat.2014.10.014
ISSN: 0300-9440
WoS: 000348880500007
Scopus: 2-s2.0-84926286468
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VinčaTY - 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 . .