The photovoltaic industry has seen exciting growth, with increasing demand for solutions that meet not only high efficiency standards but also aesthetic, maintenance, and durability needs. With this growth, the standards for photovoltaic (PV) mounting structures have evolved, but traditional hot-dip galvanization for PV brackets has come up short. It often leads to issues like post-galvanization warping and environmental concerns, creating barriers to the wider adoption of PV technologies.
Enter zinc-aluminum-magnesium (ZAM) coatings, a game-changer in this space. By adding small amounts of magnesium and silicon to zinc and aluminum coatings, ZAM technology effectively addresses the limitations of standard galvanized steel. These coatings offer excellent shear fracture protection, cover leakage points, and shield against coating damage. One of the most impressive aspects of ZAM-coated steel is its ability to "self-repair," so it resists rusting even after cuts or scratches, with minimal need for maintenance.
The advantages go beyond corrosion resistance. ZAM-coated steel has high alkaline resistance, superior processing capabilities, smooth surface finish, aesthetic appeal, and weldability. For PV brackets, these qualities mean longer-lasting protection and stable performance. The dense, protective film that forms on ZAM coatings shields the base metal from water and oxygen, slowing corrosion significantly. Even exposed areas from cuts or scratches gradually develop a new protective layer over time, keeping the metal safe without additional treatments.
Because ZAM coatings are applied before the metal even leaves the factory, they streamline the production process by eliminating the need for further corrosion protection during PV bracket assembly. Although cold-rolling with ZAM coatings can add slightly to initial costs, these brackets are still more affordable than their hot-dip galvanized counterparts due to the savings from reduced post-processing. The result? A more cost-effective and competitive option for the PV market.
ZAM coatings present an exciting future for the photovoltaic industry. As this technology advances, ZAM-coated steel will play an even bigger role in PV mounting solutions, pushing the industry toward new standards of durability and efficiency.