Duplex systems consist of hot-dip galvanisation and powder coating. The essential benefit of the Duplex systems is the long-term protection which is significantly longer than zinc-plating and coating. The most essential characteristics are the long-term corrosion resilience as well as diffusion density, UV-stability, alkali resilience, etc. The individual layer thicknesses for zinc-plating are at least 80 –120 mμ, for powder coating 60 – 90 mμ.
Best quality needs high-quality raw materials.