Preparation and Properties of Electroless Deposited Ni-Zn-P-TiO2 Nano-composite Coating

Abstract

In this paper, Ni-Zn-P-TiO₂ nano-composite coatings were prepared by electroless depositing. The electroless deposited Ni-Zn-P-TiO₂ nano-composite coatings were characterized by scanning electron microscopy, energy dispersive analysis and X-ray diffractometer. The effect of TiO₂ bath concentration on deposition behaviour was investigated. The erosion property was tested with 0.05 M HCl. The results show that the TiO₂ bath concentration has great influence on deposition rate and TiO₂ content in composite coatings. The mass losses of coatings are increasing with corrosive medium flow rate increasing and erosion angle decreasing. Electroless deposited Ni-Zn-P-TiO₂ nano-composite coatings have better anti erosion property than Ni-Zn-P alloy coatings.