BKG Corrugating Rolls are Service Specialists in Tungsten Carbide Coating Process for Corrugating Rolls In India at the Best Prices. In Tungsten Coatings process, carbide and alloy powders are fed into a combustion chamber where it is melted and accelerated to supersonic velocities. These semi-molten particles are deposited on substrate leads to rapid cooling to form a coating layer which has extremely high density & bond strength.