The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060
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-t...reated 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.
Keywords:
Corrosion / Electrochemical impedance spectroscopy / Polyester coating / Adhesion / Aluminium alloySource:
Progress in Organic Coatings, 2013, 76, 10, 1387-1395Publisher:
- Elsevier Science Sa, Lausanne
Funding / projects:
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
- 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)
DOI: 10.1016/j.porgcoat.2013.04.017
ISSN: 0300-9440
WoS: 000323406400014
Scopus: 2-s2.0-84880307503
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Živković, Ljiljana AU - Jegdić, Bore AU - Popić, Jovan P. AU - Bajat, Jelena AU - Mišković-Stanković, Vesna PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2388 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. PB - Elsevier Science Sa, Lausanne T2 - Progress in Organic Coatings T1 - The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060 EP - 1395 IS - 10 SP - 1387 VL - 76 DO - 10.1016/j.porgcoat.2013.04.017 ER -
@article{ author = "Živković, Ljiljana and Jegdić, Bore and Popić, Jovan P. and Bajat, Jelena and Mišković-Stanković, Vesna", 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.", publisher = "Elsevier Science Sa, Lausanne", journal = "Progress in Organic Coatings", title = "The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060", pages = "1395-1387", number = "10", volume = "76", doi = "10.1016/j.porgcoat.2013.04.017" }
Živković, L., Jegdić, B., Popić, J. P., Bajat, J.,& Mišković-Stanković, V.. (2013). The influence of Ce-based coatings as pretreatments on corrosion stability of top powder polyester coating on AA6060. in Progress in Organic Coatings Elsevier Science Sa, Lausanne., 76(10), 1387-1395. https://doi.org/10.1016/j.porgcoat.2013.04.017
Živković L, Jegdić B, Popić JP, Bajat J, Mišković-Stanković V. 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, Popić, Jovan P., Bajat, Jelena, Mišković-Stanković, Vesna, "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 . .