Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel
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2008
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The influence of hot-dip galvanized steel (HDG) surface pretreatment with phosphate coatings on the corrosion stability and adhesion characteristics of epoxy coatings electrodeposited on HDG steel was investigated. Phosphate coatings were deposited on hot-dip galvanized steel from baths with different concentrations of NaF (0.1, 0.5 and 1.0 g dm(-3)) and at different temperatures (50, 65 and 80 degrees C). The influence of fluoride ion concentration in the phosphating bath, as well as the deposition temperature of the bath, on the adhesion characteristics and corrosion stability of epoxy coatings on phosphated HDG steel was investigated. The dry and wet adhesions were measured by a direct pull-off standardized procedure, as well as indirectly by NMP test, while corrosion stability was investigated by electrochemical impedance spectroscopy (EIS). It was shown that under dry testing conditions all the samples exhibited very good adhesion. However, the different trends of adhesion loss of... different protective systems during exposure to corrosive agent (3% NaCl solution) were observed. The lowest adhesion values were obtained for epoxy coating on hot-dip galvanized steel, while the phosphate pretreatments significantly increase the adhesion of epoxy coatings. The highest values of adhesion strength were obtained for epoxy coating on HDG steel modified by phosphate coating deposited at 65 degrees C with 0.5 g dm(-3) NaF in the phosphating bath. EIS measurements in 3% NaCl solution are in accordance with adhesion measurements, i.e. greater values of charge-transfer resistance and smaller values of double-layer capacitance were obtained, as compared to other protective systems.
Ključne reči:
adhesion / electrochemical impedance spectroscopy / phosphating / hot-dip galvanized steel / epoxy coatingsIzvor:
Progress in Organic Coatings, 2008, 63, 2, 201-208Izdavač:
- Elsevier Science Sa, Lausanne
Finansiranje / projekti:
- Elektrohemijske karakteristike oksidnih i polimernih prevlaka na modifikovanim površinama metala (RS-142061)
DOI: 10.1016/j.porgcoat.2008.06.002
ISSN: 0300-9440
WoS: 000259069200009
Scopus: 2-s2.0-48649083606
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Bajat, Jelena AU - Mišković-Stanković, Vesna AU - Popić, Jovan P. AU - Dražić, Dragutin M. PY - 2008 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1241 AB - The influence of hot-dip galvanized steel (HDG) surface pretreatment with phosphate coatings on the corrosion stability and adhesion characteristics of epoxy coatings electrodeposited on HDG steel was investigated. Phosphate coatings were deposited on hot-dip galvanized steel from baths with different concentrations of NaF (0.1, 0.5 and 1.0 g dm(-3)) and at different temperatures (50, 65 and 80 degrees C). The influence of fluoride ion concentration in the phosphating bath, as well as the deposition temperature of the bath, on the adhesion characteristics and corrosion stability of epoxy coatings on phosphated HDG steel was investigated. The dry and wet adhesions were measured by a direct pull-off standardized procedure, as well as indirectly by NMP test, while corrosion stability was investigated by electrochemical impedance spectroscopy (EIS). It was shown that under dry testing conditions all the samples exhibited very good adhesion. However, the different trends of adhesion loss of different protective systems during exposure to corrosive agent (3% NaCl solution) were observed. The lowest adhesion values were obtained for epoxy coating on hot-dip galvanized steel, while the phosphate pretreatments significantly increase the adhesion of epoxy coatings. The highest values of adhesion strength were obtained for epoxy coating on HDG steel modified by phosphate coating deposited at 65 degrees C with 0.5 g dm(-3) NaF in the phosphating bath. EIS measurements in 3% NaCl solution are in accordance with adhesion measurements, i.e. greater values of charge-transfer resistance and smaller values of double-layer capacitance were obtained, as compared to other protective systems. PB - Elsevier Science Sa, Lausanne T2 - Progress in Organic Coatings T1 - Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel EP - 208 IS - 2 SP - 201 VL - 63 DO - 10.1016/j.porgcoat.2008.06.002 ER -
@article{ author = "Bajat, Jelena and Mišković-Stanković, Vesna and Popić, Jovan P. and Dražić, Dragutin M.", year = "2008", abstract = "The influence of hot-dip galvanized steel (HDG) surface pretreatment with phosphate coatings on the corrosion stability and adhesion characteristics of epoxy coatings electrodeposited on HDG steel was investigated. Phosphate coatings were deposited on hot-dip galvanized steel from baths with different concentrations of NaF (0.1, 0.5 and 1.0 g dm(-3)) and at different temperatures (50, 65 and 80 degrees C). The influence of fluoride ion concentration in the phosphating bath, as well as the deposition temperature of the bath, on the adhesion characteristics and corrosion stability of epoxy coatings on phosphated HDG steel was investigated. The dry and wet adhesions were measured by a direct pull-off standardized procedure, as well as indirectly by NMP test, while corrosion stability was investigated by electrochemical impedance spectroscopy (EIS). It was shown that under dry testing conditions all the samples exhibited very good adhesion. However, the different trends of adhesion loss of different protective systems during exposure to corrosive agent (3% NaCl solution) were observed. The lowest adhesion values were obtained for epoxy coating on hot-dip galvanized steel, while the phosphate pretreatments significantly increase the adhesion of epoxy coatings. The highest values of adhesion strength were obtained for epoxy coating on HDG steel modified by phosphate coating deposited at 65 degrees C with 0.5 g dm(-3) NaF in the phosphating bath. EIS measurements in 3% NaCl solution are in accordance with adhesion measurements, i.e. greater values of charge-transfer resistance and smaller values of double-layer capacitance were obtained, as compared to other protective systems.", publisher = "Elsevier Science Sa, Lausanne", journal = "Progress in Organic Coatings", title = "Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel", pages = "208-201", number = "2", volume = "63", doi = "10.1016/j.porgcoat.2008.06.002" }
Bajat, J., Mišković-Stanković, V., Popić, J. P.,& Dražić, D. M.. (2008). Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel. in Progress in Organic Coatings Elsevier Science Sa, Lausanne., 63(2), 201-208. https://doi.org/10.1016/j.porgcoat.2008.06.002
Bajat J, Mišković-Stanković V, Popić JP, Dražić DM. Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel. in Progress in Organic Coatings. 2008;63(2):201-208. doi:10.1016/j.porgcoat.2008.06.002 .
Bajat, Jelena, Mišković-Stanković, Vesna, Popić, Jovan P., Dražić, Dragutin M., "Adhesion characteristics and corrosion stability of epoxy coatings electrodeposited on phosphated hot-dip galvanized steel" in Progress in Organic Coatings, 63, no. 2 (2008):201-208, https://doi.org/10.1016/j.porgcoat.2008.06.002 . .