Thermal spraying is a process in which metallic and
non-metallic materials are deposited in a molten or
semi-molten form on a prepared component surface to optimise
its characteristics and to protect against wear, corrosion
many metals, alloys, carbides, ceramics, plastics, and
combinations can be applied in the process, its potential is
almost limitless. Using a thermal spray process, the
material is melted by electric arc or combustible gas, then
kinetic energy or a compressed gas stream atomizes the
material and carries it to the base (substrate) material. As
the particles strike the surface, they flatten, adhere and
conform to the irregularities of the surface. Upon impact
with the substrate material, these flattened particles cool
and build up to form a coating.
parts and components, new or used, can have their
performance improved and enhanced, and thereby result in
cost savings through lengthened part life. Parts may also be
enhanced with unique traits using thermal spraying. Worn and
corroded parts, which would otherwise be scrapped, can be
reclaimed using a thermal sprayed coating. The part can be
brought back to specification again and again yielding
considerable savings over time.
Though very high temperatures are necessary to melt the
material prior to spraying, the component being coated is
actually subjected to very little heat, less than 65C.
This allows the use of many different substrate materials
and alleviates damage to the component material.