Effect of TiN particles on mechanical and anticorrosive properties of oxide layers formed by PEO on silumin

Abstract

Abstract The work focuses on the effect of sub-micron and micron dispersity titanium nitride additions to the electrolyte during plasma electrolytic oxidation (PEO) of silumin A14130(11.5 wt% Si) on the structure, mechanical and anticorrosive properties of the oxide layers. It was found that the greatest positive effect of sub-micron TiN particles on the hardness and wear resistance of oxide layers is achieved at concentrations in the range of 1.0–2.5 g/l, and for micron TiN particles – at 0.5–1.0 g/l concentrations. However, for all concentrations of TiN particles, their insertion into the oxide layer has adverse effect on the anticorrosive properties of the oxide layer.