Protective properties of cataphoretic epoxy coating on aluminium alloy AA6060 modified with electrodeposited Ce-based coatings: Effect of post-treatment
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2015
Authors
Živković, Ljiljana S.
Bajat, Jelena

Popić, Jovan P.
Jegdić, Bore

Stevanović, Sanja

Mišković-Stanković, Vesna

Article (Published version)

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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.
Keywords:
Ce-based coating / Phosphate post-treatment / Epoxy coating / Electrodeposition / Corrosion / EISSource:
Progress in Organic Coatings, 2015, 79, 43-52Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-45012)
DOI: 10.1016/j.porgcoat.2014.10.014
ISSN: 0300-9440
WoS: 000348880500007
Scopus: 2-s2.0-84926286468
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IHTMTY - JOUR AU - Živković, Ljiljana S. AU - Bajat, Jelena AU - Popić, Jovan P. AU - Jegdić, Bore AU - Stevanović, Sanja AU - Mišković-Stanković, Vesna PY - 2015 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1739 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. PB - Elsevier Science Sa, Lausanne 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 S. and Bajat, Jelena and Popić, Jovan P. and Jegdić, Bore and Stevanović, Sanja and Mišković-Stanković, Vesna", 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.", publisher = "Elsevier Science Sa, Lausanne", 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. S., Bajat, J., Popić, J. P., Jegdić, B., Stevanović, S.,& Mišković-Stanković, V.. (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 Elsevier Science Sa, Lausanne., 79, 43-52. https://doi.org/10.1016/j.porgcoat.2014.10.014
Živković LS, Bajat J, Popić JP, Jegdić B, Stevanović S, Mišković-Stanković V. 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 S., Bajat, Jelena, Popić, Jovan P., Jegdić, Bore, Stevanović, Sanja, Mišković-Stanković, Vesna, "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 . .