Special surfaces – as it sounds
Sapa HM-white and various functional surfaces are some examples of surface treatment methods that solve more special needs.
In the Sapa HW-white method, an anodised profile is dipped in a bath where the lacquer adheres to the surface under the influence of direct current. The coating is then cured in an oven. As a result of this process, a white, UV light resistance surface is obtained with a gloss that does not become matt quickly. The resistance to corrosion, chemicals and dirt is high. And because the paint does not accumulate along the edges, the technique is perfect for elements which are intended to be assembled together.
Functional surfaces are custom-made for certain purposes. Hard anodising creates a surface that can withstand very tough conditions. An even stronger coating is obtained by impregnating and covering the surface with a fluoride plastic – tufram. A thin layer of silicon carbide, tungsten or diamond increases the resistance even more.
Completely different, but still very useful properties are achieved if the surface is coated with plastic, rubber or metals. Through various chemical processes the electric conductivity of the profiles can be improved or the surface can be prepared for painting, gluing, etc.