Effect of Structure Density of Milled Powder on Hot Corrosion and Erosion Resistance of HVOF-Sprayed Cr3C2-NiCr Coating

The present study investigated the effect of mechanical milling on Cr3C2-NiCr coatings deposited using the HVOF spraying method. The milling process was carried out using powder with varying characteristics to produce fine-grained and flaky powders. The milled powder coatings exhibited higher density and reduce porosity, leading to improve surface hardness and bond strength. To evaluate the performance of these coatings, hot corrosion and erosion tests were conducted under controlled conditions. The hot corrosion test was performed in a chloride environment using a vapor-condensed salt mixture (45