Barrel galvanising is a type of galvanised coating which is suitable for small parts. These are rotated in dedicated barrels which imbue a uniform and homogeneous galvanised surface on the small parts.
Each piece undergoes a particular process of electrolysis which causes the zinc ions to migrate onto the steel, forming a passivation layer with exactitude (in different colours).
This type of galvanising is ideal for trivalent chromium finishes and other treatments.
|IV||CHROMITING - (BIANCO IRIDISCENTE)|
TRIVALENT: No Chromium VI is present
HEXAVALENT: Chromium VI is present
III and V are hexavalent, the market does not currently offer a suitable alternative in trivalent for both the resistance to salt spray and aesthetic effect.