High-velocity air fuel coatings for steel for erosion-resistant applications

High-velocity air fuel (HVAF) coating processes have advantages over conventional high-velocity oxygen (HVOF) processes, resulting in coatings with superior properties. The present review first provides a concise overview of HVAF coatings, highlighting their HVOF coatings. Then, the fundamentals solid particle, slurry, and cavitation erosion are briefly introduced. Finally, performance for erosion-resistant applications is discussed detail. emerging research consistently reports HVAF-coatings having higher resistance than HVOF-coatings, which attributed to elevated hardness density improved microstructural features that inhibit surface damages caused by erosion. dominant wear mechanisms mainly functions particle impact angle. For instance, removal binder phase at high angles causes accumulation plastic strain on hard particles (e.g., WC particles) matrix, forming micro-cracks between eventually decreasing significantly affects resistance, primarily due inherent mechanical properties bearing capacity particles. Optimizing spraying parameters tailor characteristics these appears be key enhancing resistance. relationship needs clarified process tailored applications.