The surface engineering process modifies the surfaces of engineering components to improve their in-service performance, useful working lifetimes, aesthetic appearance or economics of production. It means modifying the surface of a material or component to confer surface properties, which are different from the bulk properties. The purpose of this process is to minimize corrosion, reduce frictional energy losses, reduce wear, act as a diffusion barrier, provide thermal insulation, exclude certain wavelengths of radiation, promote radiation electronic interactions, electrically insulate or simply improve the aesthetic appearance for the surface.