Slurry Erosion Behavior of HVOF-Sprayed Amorphous Coating on Stainless Steel

The slurry erosion behavior of high-velocity oxy-fuel-sprayed iron-based amorphous coatings and the reference stainless steel were both investigated. The slurry erosion–corrosion test was performed in a rotating disk rig facility with circulating system using distilled water and 3.5 wt.% NaCl slurries. The performance of uncoated substrate and as-coated samples was evaluated at various operating parameters, namely impingement angle, slurry concentration, and specimen rotational speed. The effects of the slurry erosion parameters on the microstructure and the properties of the coatings were systematically studied. The wear mechanisms of coated and uncoated samples were investigated using scanning electron microscopy. The results showed that amorphous coating exhibited higher slurry erosion–corrosion resistance compared to the stainless steel.