This method is no longer being developed and is used only in very specific applications. In comparison with other thermal spraying methods, these coatings have the weakest of basic characteristics (adhesion, cohesion, etc.), and a highly porous layer. In metal coatings, there is a high percentage of oxides, which on one hand increases the hardness, but reduces durability, cohesion of the coating and its adhesion on the other. In thermal spraying by flame, it is possible to use accessory additional material in the form of powder, wire or rod.
Electric arc spraying
Arc spraying is especially suitable for renovations and repairs. Particularly where the wear is higher - typically for forming a layer of a thickness of 1-4 mm. It is often used as priming for ceramic and metal-ceramic coatings, requiring creation of a priming coat with higher strength and toughness than the base material.
It is the most versatile method suitable for spraying of coatings with high quality and often unique properties. Plasma spraying is preferred for the formation of homogeneous and functionally graded, protective and functional coatings of metal and ceramic materials or metal-ceramic mixture. If necessary, it is possible to modify or even entirely eliminate porosity of the coating.
High-velocity oxy-fuel coating
Coating carried out at high speeds that reach up to several hundred meters per second. The result are coatings with high adhesion and coherence of particles.