Salt bath nitriding is a heat treatment process used to enhance the surface hardness and wear resistance of metals, particularly steel. In this method, the metal is immersed in a molten salt bath containing nitrogen-rich compounds. The heat causes nitrogen to diffuse into the surface of the metal, forming hard nitrides. This process is often preferred for its uniform treatment and ability to reach complex geometries without distortion. Salt bath nitriding is commonly used in industries such as automotive and aerospace, where components require improved durability and performance under stress.