The corrosion behaviour and thermal stability of epoxy coatings electrodeposited on steel: phosphatised steel and steel previously modified by electrodeposited Zn-Ni alloy was investigated during exposure to 3% NaCl. The electrochemical impedance spectroscopy (EIS), gravimetric liquid sorption experiments, thermogravimetric analysis (TGA) and anodic linear sweep voltammetry (ALSV) were used. Epoxy topcoat was formed by cathodic electrodeposition of an epoxy resin using constant voltage method. From the results obtained from EIS (pore resistance, coating capacitance), gravimetric liquid sorption experiment (diffusion coefficient) and TGA (water content inside the coating and thermal resistance), it can be concluded that electrochemical, transport and thermal properties of epoxy coatings are strongly affected by surface modification of the substrate. The better protective properties of epoxy coating on Zn-Ni sublayer can be explained by its less porous structure, caused by lower rate of ...H-2 evolution on Zn-Ni alloy, while the increased corrosion protection is due to the passive film of ZnO on the alloy surface. The mechanism of electrolyte penetration through an organic coating was also given.
Keywords:
Zn-Ni alloy / electrodeposition / epoxy coatings / corrosion EIS
TY - JOUR
AU - Mišković-Stanković, Vesna
AU - Zotović, JB
AU - Kačarević-Popović, Zorica M.
AU - Maksimović, Miodrag D.
PY - 1999
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/260
AB - The corrosion behaviour and thermal stability of epoxy coatings electrodeposited on steel: phosphatised steel and steel previously modified by electrodeposited Zn-Ni alloy was investigated during exposure to 3% NaCl. The electrochemical impedance spectroscopy (EIS), gravimetric liquid sorption experiments, thermogravimetric analysis (TGA) and anodic linear sweep voltammetry (ALSV) were used. Epoxy topcoat was formed by cathodic electrodeposition of an epoxy resin using constant voltage method. From the results obtained from EIS (pore resistance, coating capacitance), gravimetric liquid sorption experiment (diffusion coefficient) and TGA (water content inside the coating and thermal resistance), it can be concluded that electrochemical, transport and thermal properties of epoxy coatings are strongly affected by surface modification of the substrate. The better protective properties of epoxy coating on Zn-Ni sublayer can be explained by its less porous structure, caused by lower rate of H-2 evolution on Zn-Ni alloy, while the increased corrosion protection is due to the passive film of ZnO on the alloy surface. The mechanism of electrolyte penetration through an organic coating was also given.
PB - Pergamon-Elsevier Science Ltd, Oxford
T2 - Electrochimica Acta
T1 - Corrosion behaviour of epoxy coatings electrodeposited on steel electrochemically modified by Zn-Ni alloy
EP - 4277
IS - 24
SP - 4269
VL - 44
DO - 10.1016/S0013-4686(99)00142-5
ER -
@article{
author = "Mišković-Stanković, Vesna and Zotović, JB and Kačarević-Popović, Zorica M. and Maksimović, Miodrag D.",
year = "1999",
abstract = "The corrosion behaviour and thermal stability of epoxy coatings electrodeposited on steel: phosphatised steel and steel previously modified by electrodeposited Zn-Ni alloy was investigated during exposure to 3% NaCl. The electrochemical impedance spectroscopy (EIS), gravimetric liquid sorption experiments, thermogravimetric analysis (TGA) and anodic linear sweep voltammetry (ALSV) were used. Epoxy topcoat was formed by cathodic electrodeposition of an epoxy resin using constant voltage method. From the results obtained from EIS (pore resistance, coating capacitance), gravimetric liquid sorption experiment (diffusion coefficient) and TGA (water content inside the coating and thermal resistance), it can be concluded that electrochemical, transport and thermal properties of epoxy coatings are strongly affected by surface modification of the substrate. The better protective properties of epoxy coating on Zn-Ni sublayer can be explained by its less porous structure, caused by lower rate of H-2 evolution on Zn-Ni alloy, while the increased corrosion protection is due to the passive film of ZnO on the alloy surface. The mechanism of electrolyte penetration through an organic coating was also given.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Corrosion behaviour of epoxy coatings electrodeposited on steel electrochemically modified by Zn-Ni alloy",
pages = "4277-4269",
number = "24",
volume = "44",
doi = "10.1016/S0013-4686(99)00142-5"
}
Mišković-Stanković, V., Zotović, J., Kačarević-Popović, Z. M.,& Maksimović, M. D.. (1999). Corrosion behaviour of epoxy coatings electrodeposited on steel electrochemically modified by Zn-Ni alloy. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 44(24), 4269-4277.
https://doi.org/10.1016/S0013-4686(99)00142-5
Mišković-Stanković V, Zotović J, Kačarević-Popović ZM, Maksimović MD. Corrosion behaviour of epoxy coatings electrodeposited on steel electrochemically modified by Zn-Ni alloy. in Electrochimica Acta. 1999;44(24):4269-4277.
doi:10.1016/S0013-4686(99)00142-5 .
Mišković-Stanković, Vesna, Zotović, JB, Kačarević-Popović, Zorica M., Maksimović, Miodrag D., "Corrosion behaviour of epoxy coatings electrodeposited on steel electrochemically modified by Zn-Ni alloy" in Electrochimica Acta, 44, no. 24 (1999):4269-4277,
https://doi.org/10.1016/S0013-4686(99)00142-5 . .
