Evaluation of slurry erosion wear characteristic of plasma sprayed TiO₂ coated 410 steel

In the present study, slurry erosion performance of plasma sprayed Titanium oxide (TiO₂) coatings on AISI 410 steel has been investigated. Erosion studies were performed on uncoated and plasma sprayed TiO₂ coated steel using slurry erosion test rig at room temperature by varying the rotational speed (500, 750, 1000, and 1500), keeping sand concentration and time as constant. To know the erosion mechanism, SEM microphotographs were taken before and after the erosion test. EDX analysis confirms the presence of Titanium oxide particles. Vickers's micro hardness test was performed on the surface of both coated and un-coated samples to access the hardness value. Plasma sprayed titanium oxide coated 410 grade steel showed superior slurry erosion resistance as compared to un coated steel. It may be due to higher hardness and less porosity of Tio₂ coated steel substrates. (paper)