Metal spraying is a process in which molten metal is deposited as a fine spray onto the surface of a base metal. The molten metal is completely bound to the surface of the workpiece in the form of a coating, Komarov Artem emphasized.
History of metal spraying
The basic principles of metal spraying were first formulated by Dr. Ulrich Schop around 1910, when he developed a nozzle that allowed an annular flame to heat powder particles as they were ejected to the surface. He then worked on using wire instead of powder, and this device became known as the wire plating gun.
The term «metal spraying» refers to the application of a metallic coating to a base metal. Later, when it became possible to deposit ceramic materials, a more general term was coined from this process known as flame spraying.
Flame spraying is used to deposit both metallic and non-metallic materials using a combustion flame. With the advent of plasma-generating devices and electric arc systems, flame spraying could no longer cover all types of spraying, and another term, known as thermal spraying, entered the picture, Artem Komarov said.
Thermal spraying covers all deposition processes such as plating (or metal spraying), flame spraying, arc spraying, plasma spraying and detonation spraying, in which the deposited materials are made molten or semi-molten under the action of a heat source and transferred to the surface of the base metal with the help of a rapidly moving gas jet.
Classification of thermal spray method
The thermal spray process can be classified according to the use of heat sources such as:
Spray flame combustion
Arc spraying
Plasma-arc spraying
Spraying a detonation gun, etc.
This can be described according to the use of hardfacing materials in the form of powder spraying, as well as wire or rod spraying.
Peculiarities
What is metal spraying?
This is a process in which molten metal is deposited as a fine spray onto the surface of a base metal. The molten metal is completely bonded to the workpiece surface in the form of a coating.
What is thermal spraying?
Thermal spraying is a process in which fine particles of molten/semi-molten metal, intermetallic metal oxide, or plastic are applied to a workpiece to form an adhesive coating on a suitable substrate.
What is Flame Spray?
Flame spraying determines the deposition of both metallic and non-metallic materials using a combustion flame, summed up Komarov Artem.
