Driven by explosive growth in the global photovoltaic (PV) market, the solar supply chain is increasingly targeted by trade protectionism and anti-dumping barriers. Aluminum alloys have long dominated the overseas rooftop PV mounting market due to their lightweight properties and ease of processing. However, faced with increasingly severe anti-dumping tariffs on aluminum extrusions and sharp fluctuations in raw aluminum prices, the solar mounting industry urgently requires a material-level paradigm shift.

Breaking away from traditional path dependencies, SOEASY R&D has introduced the next-generation Zinc-Aluminum-Magnesium (ZAM / Zn-Al-Mg) alloy steel into its innovative EasyFlex Rooftop Mounting System. This represents not only a strategic breakthrough against trade barriers, but also a technological overhaul of material performance and cost-efficiency for rooftop mounting structures. By combining high-strength structural steel with advanced ZAM anti-corrosion technology, EasyFlex offers a more efficient, economical, and reliable material alternative to traditional aluminum rail solutions.

Why Choose Zinc-Aluminum-Magnesium (ZAM)?

1. Anti-Corrosion Mechanisms: A Comparison

• AA10 Aluminum Extrusions: Anti-corrosion performance relies primarily on anodization. Through an electrochemical process, a protective aluminum oxide coating with a thickness of approximately 10 micrometers (μm) is formed on the aluminum surface. This layer effectively blocks oxygen and moisture, preventing base metal corrosion.
• ZM275 Zinc-Aluminum-Magnesium Steel: Utilizing a steel substrate, anti-corrosion protection relies on a surface “zinc-aluminum-magnesium” alloy coating (where ZM275 indicates a coating mass of 275 g/m²). It provides triple protection via the sacrificial anode protection of zinc, the physical barrier protection of aluminum, and the magnesium-assisted formation of dense, stable corrosion products (such as zinc hydroxide and basic zinc chloride).

2. Anti-Corrosion Performance & Lifespan Comparison

• AA10 Aluminum Extrusions: Possesses moderate anti-corrosion capabilities, suitable for general outdoor environments or demanding indoor applications. In salt spray testing, AA10-grade anodized films typically endure 96 hours of Neutral Salt Spray (NSS) testing.
• ZM275 Zinc-Aluminum-Magnesium Steel: Delivers superior anti-corrosion performance, exhibiting 3 to over 10 times the corrosion resistance of pure zinc coatings with equivalent coating weight. A ZM275 coating achieves anti-corrosion performance comparable to an 80 μm hot-dip galvanized coating. Under rigorous Neutral Salt Spray (NSS) testing, ZM275 coatings can withstand up to 4,000 hours, typically backing a product warranty of up to 30 years.

Overcoming Anti-Dumping Barriers: ZAM Replacing Aluminum Alloys

In overseas PV markets, aluminum mounting systems frequently face steep anti-dumping (AD) and countervailing duties (CVD), resulting in surged import costs and heightened supply chain fulfillment risks. The EasyFlex mounting system utilizes an S350GD high-strength steel substrate paired with a ZAM275 coating process to engineer its core mounting rails. This innovative material solution offers multiple strategic advantages:

• Mitigating Tariff Risks: Replacing traditional aluminum extrusions with coated ZAM structural steel effectively bypasses anti-dumping tariff barriers on aluminum products, ensuring a robust and secure international supply chain.
• Multiplier Effect on Mechanical Properties: Utilizing S350GD structural steel, ZAM material achieves 1.6 times the tensile strength and 1.6 times the non-proportional elongation strength of conventional aluminum, significantly outperforming aluminum extrusions in mechanical capabilities. For a given cross-section, ZAM steel rails possess superior bending stiffness and tensile strength, enabling a thinner wall thickness (e.g., 1.2 mm) to achieve structural load-bearing capacity superior to aluminum alloys.
• Exceptional Overall Cost-Efficiency: Compared to high-cost anodized aluminum alloys, ZAM steel offers significant advantages in raw material and processing costs, directly reducing mounting system procurement costs by 20% to 30% for solar projects.

Superior Anti-Corrosion Mechanisms Beyond Traditional Hot-Dip Galvanizing

A key concern among project owners is whether replacing aluminum with steel makes the system prone to rust. The ZAM275 coating integrated into the EasyFlex system fundamentally shifts traditional perceptions regarding steel corrosion protection.

1. Unique Ternary Alloy Protection Mechanism

Traditional Hot-Dip Galvanizing (HDG) relies solely on a pure zinc layer (Zn) for sacrificial anode protection, which corrodes rapidly in acidic or salt spray environments. In contrast, the ZAM coating incorporates Aluminum (Al) and Magnesium (Mg) alongside zinc:

• Activation Role of Magnesium (Mg): Promotes the formation of an exceptionally dense, highly adherent protective film of Simonkolleite.
• Barrier Role of Aluminum (Al): Further enhances the chemical stability of the protective film, significantly slowing the rate at which oxygen and moisture penetrate to the steel substrate.

2. Unique “Self-Healing” Cut-Edge Capability

When mounting structures are cut, drilled, or scratched on-site, the steel substrate along cut edges of traditional hot-dip galvanized steel is directly exposed to air, triggering red rust. However, with EasyFlex ZAM rails, when cut edges are exposed, zinc, aluminum, and magnesium ions within the coating undergo an electrochemical reaction driven by ambient moisture. These ions leach out and flow over the exposed cut cross-section, forming a dense protective film that achieves “self-healing,” fundamentally eliminating the risk of structural degradation caused by edge corrosion.

Applications in Extreme Environments

Solar PV power plants are typically designed for a service life exceeding 25 years, yet rooftop environments regularly subject structures to severe salt spray, acid rain, high humidity, and industrial emissions. The material pairing of the EasyFlex system has undergone rigorous indoor and outdoor weathering tests:

• Equivalent Corrosion Resistance Capabilities: Neutral Salt Spray (NSS) test data demonstrates that the corrosion resistance of ZAM coatings is 5 to 10 times higher than that of traditional Galvanized Iron (GI), fully satisfying protective requirements in extreme environments.
• Adaptability to Complex Outdoor Environments: Whether in coastal regions with high salt spray, industrial parks with chemical emissions, or agri-PV applications with elevated humidity, the EasyFlex system effectively resists environmental degradation—guaranteeing an anti-corrosion service life of over 25 years without requiring complex maintenance over its lifecycle.

EasyFlex’s Comprehensive, Scientifically Paired Material Solution

Beyond adopting ZAM steel for core mounting rails, the EasyFlex system follows strict material compatibility and anti-galvanic corrosion principles across all component selections:

Material Innovation Driving Grid Parity in Solar Energy

Against the backdrop of the solar industry’s relentless drive toward lower Levelized Cost of Electricity (LCOE) and enhanced supply chain security, the SOEASY EasyFlex Rooftop Mounting System leverages ZAM steel rails as a technological breakthrough. It successfully bypasses anti-dumping barriers and aluminum cost constraints, delivering a rooftop PV mounting system that achieves high strength, high corrosion resistance, exceptional cost-effectiveness, and an extended lifespan.

Adhering strictly to its brand mission—”Make Solar Installation Easier”—SOEASY provides a robust line of defense for global distributed rooftop solar projects. Choosing EasyFlex Rooftop Mounting System means securing the optimal balance of technological leadership, regulatory compliance, and long-term investment returns!