Legrand has introduced a zinc aluminium surface treatment for its Cablofil steel wire cable tray systems, ideal for both white and grey spaces within data centres. This advanced finish enhances durability, corrosion resistance, and long-term performance, making it well-suited to the demanding environments of modern data centres.
The Cablofil wire mesh cable tray system offers data centre professionals several advantages, including easy installation, maximised cable capacity, and improved airflow. Importantly, the system’s surface finish reduces electromagnetic interference (EMI) by absorbing disturbances, thus protecting connected devices.
A significant concern in data centre environments is the formation of zinc whiskers—tiny filaments of pure zinc that can grow on zinc-coated products. These whiskers, if dislodged, can become airborne and land on sensitive electronic components, potentially causing damage. Legrand’s experts highlight that zinc aluminium finishes minimise the risk of zinc whisker formation, making them particularly suited for data centre applications where reliability is paramount.
Legrand’s zinc aluminium finish is a result of an advanced pre-galvanisation process where steel wire is immersed in an alloy containing both zinc and aluminium. This treatment not only enhances the system’s resistance to corrosion but also addresses the issue of 'weld burns', which are potential weak points in traditional pre-galvanised systems.
Testing has shown that Legrand’s zinc aluminium finish withstands over 1,000 hours in salt spray trials, earning it a Class 8 certification. This level of durability provides data centre operators with confidence that the Cablofil system will maintain its integrity over time. Notably, no zinc whiskers have been detected on any of Legrand’s ZnAl-coated Cablofil products.
Beyond the zinc aluminium finish, Legrand also offers other surface treatments, including electroplating and powder coating. Electroplating involves coating the steel in zinc through an electrolytic process, resulting in a smooth, shiny surface with enhanced corrosion resistance. While this finish remains popular in data centres, there is a possibility of zinc whiskers forming, although this risk is considered low.
Powder coating, another option, involves applying an epoxy powder to the steel, often used when a specific colour is required. While aesthetically pleasing, this finish does not completely eliminate the risk of zinc whiskers but is effective in identifying cable runs.
Legrand’s zinc aluminium surface treatment is becoming increasingly popular in data centres worldwide, offering a reliable alternative to traditional pre-galvanised systems. Suitable for installations of all sizes, from small commercial buildings to heavy industry applications, the Cablofil system with zinc aluminium finish is a robust and dependable choice for modern data centres.
