Corrosion behaviour of epoxy coatings investigated by EIS
Abstract
Epoxy coatings were formed by cathodic electrodeposition of an epoxy resin on steel and on electrochemically modified steel surface by Fe-P alloy using constant voltage method (resin concentration 10 wt.%, temperature 26 degrees C, applied voltage 250 V). The corrosion behaviour of these coatings was investigated during exposure to 3% NaCl using electrochemical impedance spectroscopy (EIS), polarization curves and corrosion potential - time measurements. From the time dependences of pore resistance, coating capacitance, relative permittivity of coating and Warburg diffusion impedance, obtained from EIS, and corrosion current density, obtained from polarization curves, it can be observed that the Fe-P alloy is a good barrier to transport of corrosive agent. During prolonged exposure the Fe-P layer significantly improves stability of protective epoxy system, postponing the time when electrolyte reaches the basic substrate.
Keywords:
corrosion / electrochemical impedance spectroscopy / electrodeposition / epoxy coatings / Fe-P alloySource:
Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2, 1998, 289-292, 327-335Publisher:
- Trans Tech Publications Ltd, Durnten-Zurich
DOI: 10.4028/www.scientific.net/MSF.289-292.327
ISSN: 0255-5476
WoS: 000077814800031
Scopus: 2-s2.0-0032320910
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Mišković-Stanković, Vesna AU - Zotović, Jelena B. AU - Maksimović, Miodrag D. PY - 1998 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/202 AB - Epoxy coatings were formed by cathodic electrodeposition of an epoxy resin on steel and on electrochemically modified steel surface by Fe-P alloy using constant voltage method (resin concentration 10 wt.%, temperature 26 degrees C, applied voltage 250 V). The corrosion behaviour of these coatings was investigated during exposure to 3% NaCl using electrochemical impedance spectroscopy (EIS), polarization curves and corrosion potential - time measurements. From the time dependences of pore resistance, coating capacitance, relative permittivity of coating and Warburg diffusion impedance, obtained from EIS, and corrosion current density, obtained from polarization curves, it can be observed that the Fe-P alloy is a good barrier to transport of corrosive agent. During prolonged exposure the Fe-P layer significantly improves stability of protective epoxy system, postponing the time when electrolyte reaches the basic substrate. PB - Trans Tech Publications Ltd, Durnten-Zurich T2 - Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2 T1 - Corrosion behaviour of epoxy coatings investigated by EIS EP - 335 SP - 327 VL - 289-292 DO - 10.4028/www.scientific.net/MSF.289-292.327 ER -
@article{ author = "Mišković-Stanković, Vesna and Zotović, Jelena B. and Maksimović, Miodrag D.", year = "1998", abstract = "Epoxy coatings were formed by cathodic electrodeposition of an epoxy resin on steel and on electrochemically modified steel surface by Fe-P alloy using constant voltage method (resin concentration 10 wt.%, temperature 26 degrees C, applied voltage 250 V). The corrosion behaviour of these coatings was investigated during exposure to 3% NaCl using electrochemical impedance spectroscopy (EIS), polarization curves and corrosion potential - time measurements. From the time dependences of pore resistance, coating capacitance, relative permittivity of coating and Warburg diffusion impedance, obtained from EIS, and corrosion current density, obtained from polarization curves, it can be observed that the Fe-P alloy is a good barrier to transport of corrosive agent. During prolonged exposure the Fe-P layer significantly improves stability of protective epoxy system, postponing the time when electrolyte reaches the basic substrate.", publisher = "Trans Tech Publications Ltd, Durnten-Zurich", journal = "Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2", title = "Corrosion behaviour of epoxy coatings investigated by EIS", pages = "335-327", volume = "289-292", doi = "10.4028/www.scientific.net/MSF.289-292.327" }
Mišković-Stanković, V., Zotović, J. B.,& Maksimović, M. D.. (1998). Corrosion behaviour of epoxy coatings investigated by EIS. in Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2 Trans Tech Publications Ltd, Durnten-Zurich., 289-292, 327-335. https://doi.org/10.4028/www.scientific.net/MSF.289-292.327
Mišković-Stanković V, Zotović JB, Maksimović MD. Corrosion behaviour of epoxy coatings investigated by EIS. in Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2. 1998;289-292:327-335. doi:10.4028/www.scientific.net/MSF.289-292.327 .
Mišković-Stanković, Vesna, Zotović, Jelena B., Maksimović, Miodrag D., "Corrosion behaviour of epoxy coatings investigated by EIS" in Electrochemical Methods in Corrosion Research Vi, Pts 1 and 2, 289-292 (1998):327-335, https://doi.org/10.4028/www.scientific.net/MSF.289-292.327 . .