Plastification is the most common method of protection of metals and aluminum today. The whole process takes place in several stages.First, the surface of the aluminum is degreased by immersion in sodium hydroxide. After that, the so-called primer thickness of 0.5 to 1.5 micrometers.
This layer has two basic tasks:
– to increase the bond between aluminum and the organic layer, ie. colors.
– to reduce the so-called filiform corrosion
Filiform corrosion occurs due to poorly prepared surface such as wrinkled surface or so-called. orange peel prone to separation from the aluminum surface.
In the next phase, a positively charged color powder is applied. The profiles we plasticize are counter-charged so that the powder and the surface to which the powder is applied firmly adhere.
The pieces thus dusted are fed into special ovens which are heated at a temp. from 180-200 C. The heating results in melting and polymerization of the powder molecules, with a layer of plasticization of 50-70 micrometers thick.
For interior elements, epoxy-based paints are used and for polyester-based exterior elements, which are significantly more resistant to ultraviolet rays.
The choice of plasticizing tone is made according to the RAL chart. Damage to the plasticised surface is successfully remedied by sprays or powders dissolved in a nitro diluent.