This method is based on the particle charging by friction to get the same effect as Corona gun, but without generating an electrostatic field.

The powder particles are charged here by pushing them towards a surface specailly shaped for this purpose

It is used especially for the parts with a geometrical complex surface (deep spaces)

It is the most used method ;it is based on the partial powder covering by a high voltage performed by the gun cascade

This method is based on the direct immersion of the warmed parts in the fluidized bed and it is used only for specialized industries.