A short explanation of the different techniques:

Autogenic wire spraying
In this process a material in wire form is transported by means of an electric or compressed air motor by a spray gun and melted in a burning gas-oxygen mixture. The melted material is then atomized in the direction of the workpiece by compressed air.

The materials for spraying in this process are metals and alloys which can be drawn in wire form and have a melting point far below the temperature of the heat source being used. When zinc or aluminium is used for the wires, this is also referred to as “schooping”, after the name of the inventor.

Field of application:
- Repair of damage
- Dimensional corrections/filling layers
- Atmospheric and heat corrosion protection

Autogenic powder spraying
Because fused alloys on nickel or cobalt basis and ceramic materials cannot be produced in wire form, powder spraying was developed in 1956. Powder spraying is currently no longer used only for these materials, but also for a large number of other spraying powders. The operation of the powder spraying installation does not differ greatly from that of the wire spraying installation.

The material for spraying is entrained by a gas in the spray gun where it is melted in a burning gas-oxygen mixture. Materials are also sprayed with this process which require a further heat treatment. The purpose of this is to create a good adhesion between substrate and spray layer and between the spray particles mutually. As a result of the heat treatment the lamellar structure disappears and a highly homogenous structure is created.

Field of application:
- Repair of components
- Dimensional corrections
- Abrasive and adhesive resistance
- Erosion resistance
- Chemical resistance
- Atmospheric and temperature corrosion protection