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Autophoretic technology DAC

Autophoresis, also known as self-deposition or A-coat (DAC), is a painting process in an aqueous environment that is based on chemical reactions.
This process was first used in industrial conditions in 1975. There are currently many installations in the automotive and metal industries.
Autophoresis is a dip painting system where paint dispersions are attracted to submerged parts without the help of an external electric field. In the autophoretic painting process, a mild acid is used to digest the metal surface and release iron ions into the solution. Particles of vinyl paint (latex) bind with iron ions and are attracted to the metal surface.
This technology is an alternative to electrophoretic painting. In the process of autophoresis, the number of necessary surface treatments and treatments of the painting process itself decreases.
The characteristic features of the autophoresis process are:
• even coating thickness also on details with complex shapes,
• high corrosion resistance of the coating (1000 hours - salt spray test),
• simplicity of the process and its control,
• environmental friendliness - a limited amount of volatile substances released in the process that do not contain hazardous compounds,
• no restrictions on packing details in the tub and supplying an electric field that occurs in electrophoresis.
• low temperature drying process - 100 -110ºC. This makes it possible to paint complete assemblies containing parts that are not resistant to higher temperatures - e.g. rubber anti-vibration insulators.
• good edge coverage - in the drying process there is no phenomenon of paint flow, as is the case with powder paints and KTL. Therefore, the thickness of the paint film on the edges is not reduced.
• high abrasion resistance of the coating - due to the fact that the coating binds directly to the metal and not through the phosphate layer, a high mechanical resistance of the coating is obtained.

 

 

  • Autophoretic technology DAC
    Autophoretic technology DAC
  • Autophoretic technology DAC
    Autophoretic technology DAC
  • Autophoretic technology DAC
    Autophoretic technology DAC
  • Autophoretic technology DAC
    Autophoretic technology DAC