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The mechanism of cathodic electrodeposition of epoxy coatings and the corrosion behaviour of the electrodeposited coatings

VESNA B. MI[KOVI]-ST ANKOVI], M. D. Maksimovi}

2002enelectrodepositionepoxy coatingscorrosionmechanismprotection

Abstract

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The study investigates the mechanism of cathodic electrodeposition of epoxy coatings, focusing on the growth of organic films during the deposition process. The objective was to develop a model that defines current density-time and film thickness-time relationships, and evaluate the rate constants for hydroxide ion evolution and organic film deposition. A comprehensive methodology employing electrochemical impedance spectroscopy, thermogravimetric analysis, gravimetric liquid sorption experiments, differential scanning calorimetry, and optical microscopy was applied. The results reveal that the deposition parameters significantly influence the cathodic electrodeposition process and the protective properties of the coatings. Specifically, the interaction of applied voltage, bath temperature, and resin concentration was found to affect film thickness and the corrosion stability of the epoxy coatings. The analysis demonstrated that the conduction through the organic coating is primarily dependent on the macropores, while the micropores contain a larger quantity of electrolyte. This study provides insights into the protective capability of epoxy coatings against corrosion, emphasizing the importance of understanding the electrodeposition parameters in optimizing coating performance.

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Cite This Work

@article{7567c2da-25e9-4838-8c46-e7804adc0b92,
  title={The mechanism of cathodic electrodeposition of epoxy coatings and the corrosion behaviour of the electrodeposited coatings},
  author={VESNA B. MI[KOVI]-ST ANKOVI] and M. D. Maksimovi}},
  year={2002},
  language={en}
}
TY  - JOUR
TI  - The mechanism of cathodic electrodeposition of epoxy coatings and the corrosion behaviour of the electrodeposited coatings
AU  - VESNA B. MI[KOVI]-ST ANKOVI]
AU  - M. D. Maksimovi}
PY  - 2002
LA  - en
ER  -

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