Thermal spraying is a coating process that involves applying a layer of material onto a surface to enhance its properties, such as wear resistance, corrosion resistance, or thermal insulation. This technique uses heat to melt or soften the coating material, which is then propelled onto the substrate, forming a strong bond as it cools and solidifies. There are various methods of thermal spraying, including plasma spraying, flame spraying, and arc spraying. Each method utilizes different heat sources and materials, allowing for a wide range of applications in industries like aerospace, automotive, and manufacturing.