Hot-dip galvanisation is the most effective treatment method for protecting ironwork from the aggression of atmospheric agents.
The grating panels, after the washing and pickling treatment that allows a deep cleaning of the metal, are immersed in a bath of liquid zinc. The zinc adheres to the steel, creating a coating of controlled thickness, in accordance with UNI EN ISO 1461 standard.
The freshly galvanised panels are left to cool and individually checked to remove small imperfections. In the days following galvanisation, due to the self-passivating characteristics of zinc, a layer of zinc oxide forms on the entire surface, protecting the product for decades. Zinc, in fact, being a less noble metal than iron in chemical terms, offers cathodic protection, oxidising itself instead of the metal it covers.