Yes, galvanized steel can rust, but it takes a long time. The zinc coating protects the steel for decades, often lasting 50 years or more in mild environments. In harsher conditions, like coastal or industrial areas, rust might appear sooner, but this protection may still last. For procurement specialists and facility managers, galvanized steel cable tray is a go-to solution for indoor cable management, prized for its durability and cost-effectiveness. Protecting cable trays from corrosion ensures they remain functional and safe over time. Example: A commercial office building needed to replace its old, rusted. Dry indoor rooms should use pre-galvanized (PG) steel. They are used to support electrical and data cables in.