Why duplex coatings?

The term "duplex" describes the combination of two layers that, so to say, "share the work" amongst themselves. The organic topcoat has a high mechanical toughness and ensures your components look good. If the topcoat nevertheless becomes damaged, the usual good cathodic corrosion protection is still provided by the electroplated undercoat, thus preventing subsurface corrosion of the topcoat.

We offer our duplex treatments in combination with liquid paint systems and environmentally friendly powder coatings (no solvents).

The advantages of duplex coatings:

• Functional and decorative
• Very good looks, even after extended use
• Up to 1000 hours against base metal corrosion in the salt spray test according to DIN 50021 SS
• Malleable after the coating is applied without the coating being damaged (bending, swaging, pressing, flanging)
• Thermally resistant up to 180 °C, e.g. in the engine compartment
• Partial covering of, for instance, connections and screw threads – thanks to the electroplated layer, they are protected against corrosion all the same

Which coating combination?

Whilst coatings of sealer with thicknesses of approx. 0.5-5 µm are normally applied wet-on-wet directly during the electroplating process, the duplex treatments, on the other hand, require two different process steps. A paint coating is applied to the cathodic corrosion protection (zinc, ZnFe or ZnNi), either as liquid paint, as a powder coating or as electrophoretic paint (KTL). If the workpieces are to be shaped later on, a suitable adhesion promoter is essential.

The topcoat is applied electrostatically in coating lines. In the case of smaller parts, it is applied using the spin-coating technique or in centrifuges.

Our reliable and effective duplex systems:

Zinc + Delta Flex (black) Zinc + KTL (black) Zinc + powder coating (black) Zinc-iron + Delta Flex (black) Zinc-iron + KTL (black) Zinc-iron + powder coating (black) ) Zinc-nickel + Techseal (silver, black) Zinc-nickel + Delta Flex (black) Zinc-nickel + KTL (black) Zinc-nickel + powder coating (black)

In our rack plants we coat components up to a size of 1000 x 1000 x 200 mm.

We manufacture according to various standards. These include, among others:

• ATE N 106 61.00
• BMW GS 90010
• BOSCH N67F
• DIN 50923
• DBL 8440
• GME 00 252
• GME 3044
• VW 13750/TL265/TL196

We would be pleased to manufacture according to your own or other standards as required!

For coating bulk articles, such as nuts, bolts, rivets, etc., we offer low-cost and effective barrel plating in combination with automated paint finishing.

 Duplex-Verfahren(DE) 355.70 Kb