Static galvanisation on frame
Maximum treatable dimensions 2800x1300x600. Medium to large items are galvanised on an automatic plant where the parts are hung one-by-one on a frame.
Alkaline zinc
A galvanising process that provides our excellent thickness distribution even on objects with the most complex geometries. We recommend this treatment as the best for reaching maximum corrosion resistance and thickness uniformity.
Acid zinc
A galvanising process particularly suitable for all items for which appearance prevails over deposit uniformity. Recommended for ‘difficult’ materials such as Pb steels (AVP, PR80..) and cast irons.
Passivations
Passivation is a post-galvanisation treatment, consisting of the formation of a thin layer or film that aims to enhance protection against zinc oxidation (white rust). It has different colours according to type.
Blue passivation
Passivation is a post-galvanisation treatment, consisting of the formation of a thin layer or film that aims to enhance protection against zinc oxidation (white rust). It has different colours according to type.
Yellow passivation
This passivation gives the treated objects a distinctive and pleasant yellow colour with red reflections. Very popular in furnishing, it gives high corrosive protection to zinc (> 200h salt spray). The chromatisation layer contains cobalt and complies with RoHs 2011/65 EU directives.
High-resistance or technical passivation
High-strength passivation refers to the capacity to increase the corrosion ‘resistance’ of zinc, by virtue of which protection reaches 240h in neutral salt spray. The appearance is iridescent with pink and green hues, and a yellowish hue if the zinc is electro deposited from alkaline solution, and neutral if from acid zinc. It contains cobalt and complies with RoHs 2011/65 EU directives.
Black passivation
Passivation used for decorative purposes, to prevent light reflection and to improve heat absorption. It has a considerable thickness (2μm), moderate corrosion resistance (24<Bk<48), and is therefore often sealed or painted. For alkaline zinc we use triple-function passivation, which complies with RoHs guidelines, while for acid zinc we currently use 6-function passivation with silver salts.
