☀️ ZAM in Solar Mounting: Penetration Jumped from 10% to 35% — And the New Standard Just Raised the Bar

The solar industry is not just adopting ZAM coated steel — it is standardizing it.

According to industry research, ZAM‘s penetration rate in photovoltaic mounting steel climbed from approximately 10%–18% in 2023 to 25%–35% in 2025 — a gain of 15–17 percentage points in three years, averaging about 5 points per year. The material is now in a “high-speed penetration” phase, displacing traditional hot-dip galvanized steel not only in solar mounting but also in livestock equipment, outdoor steel structures, warehouse racks, and municipal guardrails.

The performance gap is measured in hours of salt spray exposure.

✅ Corrosion resistance 3–10x that of traditional GI — with 275g/m² coating, neutral salt spray testing can exceed 8,000 hours without red rust, and design service life reaches 30 years.

✅ Self-healing cut edges — ZAM forms a dense protective layer at cut and scratched edges, preventing the red rust that plagues GI in coastal and high-humidity solar farms.

✅ A dedicated standard now exists — YB/T 6422-2025, the industry standard for continuously hot-dip Zn-Al-Mg alloy coated steel for photovoltaic mounting, took effect on July 1, 2026. It covers thickness 0.50mm–6.0mm and specifies requirements including plane neutral cyclic salt spray red-rust-free time of ≥1,200 hours.

Specifying ZAM is no longer just a preference — it is becoming a documentation requirement. Project owners are asking for coating mass, salt spray reports, and 25-year warranties. Suppliers who cannot provide traceable material data are losing orders.

✅ Coating weight: ZM40 to ZM600 — China’s first ZM600 producer, covering and exceeding the common ZM275 specification

✅ Thickness: 0.3mm to 8.0mm — suitable for structural solar components

✅ Width: 900mm to 1600mm — matching common purlin and rail widths

✅ Grades: DX51D–DX57D, S220GD–S550GD

✅ Daily stock: 3,000+ tons — fast delivery for solar project schedules

✅ ZAM steel pipe: First enterprise in China to manufacture ZAM steel pipe — ideal for ground screw and pile applications

📩 Contact us today. Tell us your required ZM coating weight and structural grade — we‘ll match it to your solar project specification and quote within 24 hours.