Journal of the Serbian Chemical Society 2000 Volume 65, Issue 12, Pages: 923-933
https://doi.org/10.2298/JSC0012923M
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The effect of Zn-Ni sublayers on the corrosion behaviour and thermal stability of epoxy coatings electrodeposited on steel
Mišković-Stanković Vesna B. (Faculty of Technology and Metallurgy, Belgrade)
Bajat Jelena B. (Faculty of Technology and Metallurgy, Belgrade)
Maksimović Miodrag D. (Faculty of Technology and Metallurgy, Belgrade)
Kačarević-Popović Zorica M. (Vinča Institute of Nuclear Sciences, Belgrade)
The electrochemical and transport properties, as well as the thermal
stability of epoxy coatings electrodeposited on steel and steel modified by
Zn-Ni alloys were investigated during exposure to 3% NaCl. The Zn-Ni alloys
were electrodeposited on steel using direct and pulse current. From the time
dependence of the pore resistance of the epoxy coating (impedance
measurements), the diffusion coefficient of water through the epoxy coating
(gravimetric liquid sorption measurements) and the thermal stability of the
epoxy coating (thermogravimetric analysis), it was shown that Zn-Ni
sublayers significantly improve the corrosion stability of a protective
system based on an epoxy coating. The values of the pore resistance were
almost unchanged over a long period of immersion time for epoxy coatings on
steel modified by Zn-Ni alloys, inidicating the great stability of these
protective systems.
Keywords: electrodeposition, epoxy coatings, Zn-Ni alloys, steel, corrosion, EIS