A coating is a layer of material put onto a substrate to improve the surface qualities for corrosion and wear protection, according to surface engineering. Service environment, life expectancy, substrate material compatibility, component shape and size, and cost are all factors that influence coating selection. Coating techniques for depositing different types of material at thicknesses ranging from a few microns to several millimetres are available.
Surface engineering is a sub-discipline of materials science concerned with solid matter's surface. Chemistry, mechanical engineering, and electrical engineering are among the fields where it can be used. Surface engineering is the process of changing the properties of a surface phase in order to slow down its degradation. This is achieved by making the surface resistant to the environment it will be employed in. It provides low-cost material that can be used to create a strong design.