Zinc is often used to protect pipes and components from oxidation (rusting). We will be pleased to organize galvanizing for you. The zinc layer is applied by either a hot dipped or electrolytic process.
With hot dipped galvanizing the material is immersed in a bath of liquid zinc. Once it solidifies, the zinc layer has a matt appearance. When pipes with relatively thin walls compared to their diameter are galvanized using this method, there is a risk of warping. The advantage of hot dipping is that the inside and outside of pipes are evenly galvanized. The thickness of the zinc layer depends on the thickness of the material to be galvanized.
Specifications
- Hot dipped galvanized to NEN EN 1461 or ASTM A-123
- Minimum diameter 17 mm
- Minimum length 6 m
- No guarantee that pipes will not warp
With electrolytic galvanizing the zinc layer is deposited electrolytically by immersing the product in a water-based solution and passing an electric current through them. The layer of zinc is then passivated to increase its corrosion resistance. The passivation layer is a thin layer of zinc chromate on top of the zinc and can range in color from blue and yellow to green and black. It gives the material a satin appearance. In contrast to hot dipped galvanizing, there is no risk of relatively thin-walled pipes warping. A disadvantage of electrolytic galvanizing is that pipes are only galvanized on the outside. If the inside also needs to be galvanized, an additional anode is required on the inside.
Specifications
- Layer thickness 8–12 µm
- Standard blue passivated; yellow also available
- For 5-7 m pipe
- Standard packaging: perforated film