Preparation of Co–P–TiO₂ nanocomposite coatings via a pulsed electrodeposition process

ABSTRACT

A series of Co–P–TiO₂ nanocomposite coatings were prepared via pulsed electrodeposition technique. TiO₂ nanoparticles were embedded into the coating matrix using TiO₂ sol. The phase constituents of nanocomposites were identified using X-ray diffraction. The surface morphology of nanocomposites was obtained through scanning electron microscopy. Wear tests and corrosion tests were conducted to determine the coating performance. Electrochemical characterization was performed by electrochemical impedance spectroscopy analysis. The nanocomposite coatings made via conventional pulse electrodeposition had a relatively ordered surface morphology and enhanced mechanical behaviour, which is associated with the increased strengthening effect of embedded nanoparticles. When applying a pulse reverse current, the Co–P–TiO₂ nanocomposite coating had improved corrosion resistance owing to its smooth and uniform surface morphology.

KEYWORDS:

• Nanocomposite
• TiO₂
• pulsed electrodeposition
• mechanical property

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was supported by the National Natural Science Foundation of China (51601073), Jiangsu Distinguished Professor Project (1064901601), and Start Research Fund of Jiangsu University of Science and Technology (1624821607-5).