Flame Spraying

Flame Spraying Process

Flame spraying is part of a wider group of coating processes known as thermal spraying. In these processes, a consumable (usually a powder or a wire) is heated and propelled onto a substrate to form a coating. Flame spraying is the oldest of the thermal spraying processes. A wide variety of materials can be deposited as coatings using this process and the vast majority of components are sprayed manually. Flame spraying has distinct advantages, including ease of application and low cost, compared with the other spraying processes. These benefits make it a widely used process.

Flame spraying uses the heat from the combustion of a fuel gas (usually acetylene or propane) with oxygen to melt the coating material, which can be fed into the spraying gun as a powder, wire or rod. The consumable types give rise to the two process variants:

High Technology Spray Process with High Strength Adhesion and Low Porosity

HVOF SPRAY SYSTEM

High Velocity Oxy Fuel (HVOF) Spray System is a coating technique for enhancing the surface characteristics of a material, or extending its service life. Finely powdered particles of metal, ceramic or carbide compounds are heated and accelerated by a high temperature stream of gas to form a high energy spray of semi- molten droplets which hit the target substrate, adhere to it and form a tough permanent coating.

HVOF uses a combination of thermal and kinetic energy to ensure that the particle, form a coating on the substrate without overheating, thereby no distortion takes place. Furthermore, several hundred different materials can now be spray in this way with coatings like Aluminium, Metallic alloys, Nickel, Ceramics such as Oxides of Aluminium and Chromium.