A zinc or aluminium layer is applied onto the surface in this process.
The process uses zinc wire held in the spray pistol itself which is melted by flame at 2200°C. The molten zinc is then sprayed onto the treatment surface using compressed air. It forms a solid, completely sealed zinc layer once it hits the surface. The galvanised (zinc) layer has a minimum thickness of between 30 µm and ± 150 µm
This zinc or aluminium layer is extremely dense resulting in the surface being completely sealed off from the atmosphere. This forms a very effective barrier against the formation of corrosion.
A precondition of this process is that the surface must be blasted prior to flame galvanising.
Pure aluminium can also be used in the spray galvanising process. This treatment is very often used for offshore applications.
Advantages of spray galvanising
- The lifespan of the product is lengthened considerably.
- Provides better adhesion to the prepared surface.
- The layers are less sensitive to mechanical damage.
- The layers are dry on application.
- The layers provide immediate protection.
- The layers provide an ideal surface for painting systems.