600-hr. Accelerated Salt Spray Test according to UL 3703. Test confirms the self-healing MAC Steel is higher in resistance to corrosion compared to galvanized steel (foreground).
In an event of scratching or damage, the MAC Steel begins a self-healing process. The upper coating layer dissolves to cover the damaged area and accelerates the growth of a stable corrosion product. Image UL 600-hr accelerated salt spray test cut side view.