Shafel Tech

Thermal spraying is a process in which metals are melted and sprayed on a surface to form coating. A coating produced by this process in which molten or softened particles are applied by impact onto a substrate. Different types of thermal spraying includes flame spraying, metallizing, and hardfacing. The metals sprayed are pure metals or alloys that are generally in the form of powders, wires, or rods.

A combustion source or an electric arc provides the energy that is used to melt the metal. After the metal is melted, compressed air or another gas propels the droplets to the surface being coated. In many cases, thermal sprayed surfaces are machined / grounded, to provide the desired surface finish.

A common feature of all thermal spray coatings is their lenticular or lamellar grain structure resulting from the rapid solidification of small globules, flattened from striking a cold surface at high velocities.

The Detonation-Gun uses measured quantities of oxygen, acetylene and particles of a coating material, detonated by a timed spark in the firing chamber. The resultant high-speed gas stream heats up the coating particles to a plastic state and throws them from the gun barrel at supersonic velocity (upto 1200m/s).