Holz Technic Catalogue Page 97
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C4 EVO COATING There are environments that fear hardware, and advanced fasteners that don't. Try C4 EVO coated screws, the treatment that makes them suitable for extreme conditions: they resist corrosion while maintaining the mechanical strength of carbon steel. C4 EVO COATING C4 EVO is a multilayer coating composed of: • A central binding layer for the external functional layer. • A internal layer of around 4 μm zinc microns which acts as an additional layer of corrosion resistance. Organic matrix Cohesion layer C4 EVO COATING Aluminium Zn - Zinc Fe - Carbon Steel SCREW BODY • An external functional layer of epoxy matrix with aluminium flakes of around 15-20 μm, which gives the coating optimum resistance to mechanical and thermal stresses. The aluminium flakes also serve, when required, as sacrificial cathodes for the metal base of the screw.
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