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Composite Zn-Ni coatings incorporating TiO₂ nanoparticles were obtained by electrodeposition on steel from alkaline solution containing triethanolamine (TEA) as complexing agent for Ni²⁺ and polyethyleneglicol (PEG) in combination with vanillin, as leveling/brightening agents. The influence of TiO₂ nanoparticles on phase composition and structure of Zn- Ni coatings were investigated by X-ray diffraction and SEM-EDAX methods. By using polarization measurements, the corrosion behaviour of the nanocomposite coatings was examined and the corrosion process on Zn-Ni-TiO₂ composite coatings was found to be slower than on pure Zn-Ni surface.

Keywords: Corrosion; Electrodeposition; Zinc-Nickel alloy; alkaline electrolyte