Investigation of corrosion properties of Ni matrix nanocomposite coatings produced by electrodeposition technique

This research aimed to investigate electrochemical corrosion behavior of Nickel matrix nanocomposite coatings produced by electrodeposition technique in a Watts bath containing titanium dioxide and Zinc doped titanium dioxide nanoparticles. In this study, titanium dioxide and Zinc doped titanium dioxide nanoparticles were prepared using a sol-gel method. Obtained results indicate that all synthesized nanoparticles and particle sizes were below 100 nm. Nickel matrix nanocomposite coatings were produced by using electrochemical deposition tecnique on stainless steel substrates. The Watts bath for production of nanocomposite coatings were prepared using the different amounts of titanium dioxide and Zinc doped titanium dioxide nanoparticles. Besides, applied current density on the coating performance were investigated in order to optimize the coating properties. Pure Nickel coatings were also deposited under the same experimental conditions for comparison. The structural, morphological, mechanical and corrosion properties of the Nickel matrix nanocomposite coatings were investigated. The surface morphology, elemental composition and phase structure of the nanocomposite coatings were examined by Scanning Electron Microscopy, Energy Dispersive Spectrometer and X-ray Diffraction, respectively. Obtained results show that Nickel-Titanium dioxide and Nickel- Zinc/Titanium dioxide nanocomposite coatings improved corrosion properties.