Flamespray: Autogenous wire spraying
In autogenous wire spray all spraying materials which can be in a wire shape (metals en metal alloys), are molten in a acetylene/oyxgen flame and sprayed using compressed air onto the workpiece. Hence a lamellar structure is created because particle by particle is slammed onto the base material.
Autogenous wire spray process
With autogenous wire spray a metal wire is molten in a gas/oxygen flame and sprayed using compressed air. The flame temperature when autogenous flamespaying is between 2,800 to 3,200ºC. This allows to apply different metals and alloys. Autogenous wire spray is frequently used for corrosion protection and repair purposes.
The adhesion resulting from autogenous wire spray, is mainly mechanical. Chemical and physical factors play only a minor role. The coating is very durable.
The structure of the modified layer is always micro-porous (up to 40%). This gives the ability to hold oil and lubricating properties is obtained.
Despite the flame temperature of about 2800-3000 ° C, autogenous wire spray is a cold process. I.e. the workpiece temperature during spraying will not exceed 150° C. The advantage is that any distortion of structural change due to head is is excluded.
Due to the porosity of the material may be oil-lubricating properties, but a sealant or sealer and neutralize this property.
With autogenous wire spray about 20 well known materials and alloys can be sprayed, including:
- C- and stainless steels