Original Articles: 2013 Vol: 5 Issue: 5
Fabrication of zinc-nano TiO2 composite films: Electrochemical corrosion studies
Abstract
The composite coating of zinc-TiO2 was generated successfully on steel from the optimized zinc electroplating bath
containing TiO2 nanoparticles. The composite zinc-TiO2 coating produced from bath solution with different amount
of TiO2 was tested for their corrosion behavior by electrochemical studies using polarization and Impedance
methods. The TiO2 incorporated zinc coatings shown better corrosion resistance towards aggressive media when
compare to pure zinc coating. The surface structure was examined from their scanning electron microscopic images
and X-ray diffraction spectra. The presence of TiO2 in the coating was confirmed from energy dispersive X-ray
diffraction spectra. The embedded TiO2 nanoparticles changed the compactness, microstructure and preferred
orientation of the deposit when compare to pure zinc coating.