Effect of titanium oxide ceramic particles concentration on microstructure and corrosion behaviour of Ni-P-Al2O3-TiO2 composite coating

Composite coatings are coatings that have been considered in terms of properties, such as corrosion resistance, oxidation resistance and excellent hardness. In this study, Ni-P-Al2O3-TiO2 composite coating was made on AISI 316 steel using direct current deposition technique. The microstructure of the coating and its corrosion resistance were studied by changing the amount of titanium oxide (1, 2, 3 and 4 mml:mspace width=3.33333pt mml:mspace g mml:mspace width=0.333333em mml:mspace l-1) in the bath. To investigate the morphology of the coating and the analysis of the coated material, a scanning electron microscope (SEM) and EDS microscopy were conducted, respectively. The results showed that in the bath containing 4l-1 titanium oxide has the highest corrosion resistance.