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Pre-Painted AluZinc Corrugated Sheet is an advanced, high-performance building material engineered for superior corrosion resistance and longevity. It features a 55% Aluminium-Zinc alloy coated steel substrate (Galvalume®/AluZinc), which is subsequently coil-coated with high-quality paint systems before being formed into a robust corrugated profile. This innovative combination delivers the strength of steel, the exceptional protection of the Al-Zn-Si alloy, and the aesthetic versatility of organic coatings, making it the premier choice for demanding architectural and industrial applications where extended service life and minimal maintenance are critical.
2. Key Features & Advantages
（1）Exceptional Corrosion & Heat Resistance
The 55% Aluminium-Zinc alloy coating provides superior barrier and galvanic protection compared to standard galvanized steel. The aluminum component forms a dense, stable oxide layer that resutes atmospheric corrosion and reflects up to 80% of solar heat, while the zinc offers sacrificial cut-edge protection. This results in a service life typically 2-4 times longer than traditional GI sheets in harsh environments.
（2）Outstanding Durability & Aesthetics
Combined with high-performance paint finishes like PVDF (Kynar 500®/Hylar 5000®), the product offers unparalleled resistance to UV fading, chalking, and chemical attack. It maintains its color and gloss integrity for decades, backed by extensive warranties, ensuring buildings retain their visual appeal with virtually no maintenance.
（3）Optimal Strength-to-Weight Ratio
The corrugated design provides excellent structural rigidity and load-bearing capacity (wind uplift, snow load) while keeping the overall weight low. This allows for lighter support structures, faster installation, and cost savings on framing and foundations.
（4）Economic & Sustainable Solution
While the initial investment may be higher, its dramatically extended lifespan and near-zero maintenance translate to the lowest total cost of ownership. The materials are 100% recyclable, and the high reflectivity contributes to building energy efficiency, supporting sustainable construction goals.
| Parameter | Standard Specification | Notes / Standards |
|---|---|---|
| Base Substrate | Commercial Quality Steel (CQ), Structural Steel (SS) | ASTM A792, AS1395 |
| Metallic Coating | 55% Aluminium-Zinc Alloy (AZ) | Standard Coating Mass: AZ100, AZ120, AZ150, AZ180 [g/m²] |
| Paint System | Premium Polyester (PE), Siliconized Polyester (SMP), PVDF | 2/1 or 2/2 coat system. PVDF is recommended for premium projects. |
| Sheet Thickness | 0.35 mm - 0.80 mm (Base metal) | Custom thickness available. |
| Paint Coating Thickness | Top: ≥20µm (PE), ≥25µm (PVDF) | ASTM D6132 |
| Corrugation Profile | Various (e.g., 820, 1050, Custom Trapezoidal) | Enhances drainage and structural strength. |
| Standard Sheet Width | 1000 mm, 1200 mm (Effective cover) | Depends on profile. |
| Performance | Salt Spray Resistance: >1000 hrs (AZ150+PVDF) | ASTM B117 |
（1）High-Corrosion & Coastal Environments
The premier choice for ports, shipyards, chemical plants, and coastal buildings where salt spray, high humidity, and industrial pollutants are prevalent. The AluZinc base provides unmatched defense against these aggressive elements.
（2）Premium Industrial & Commercial Roofing
Ideal for factories, warehouses, and distribution centers requiring a long-term, maintenance-free roofing solution. Its heat reflectivity also helps reduce cooling energy costs in large facilities.
（3）Architectural Facades & Signature Buildings
Used in airports, stadiums, cultural centers, and high-rise buildings where both long-term durability and specific aesthetic design are paramount. Available custom colors and finishes allow for creative freedom.
（4）Agricultural & Specialized Buildings
Excellent for livestock buildings, fertilizer storage, and food processing plants due to its resistance to ammonia and other corrosive vapors commonly found in agricultural settings.
Q1: Why is AluZinc (Galvalume®) better than regular Galvanized (GI) for my project?
A1: AluZinc provides significantly better corrosion resistance, especially in industrial or coastal atmospheres, and offers superior heat reflectivity. For projects where longevity (25+ years) and thermal performance are priorities, or in corrosive environments, AluZinc delivers a much better lifetime value despite a slightly higher initial cost.
Q2: What do the coating designations like AZ150 mean?
A2: The "AZ" stands for Aluminium-Zinc, and the number (e.g., 150) indicates the total coating mass in grams per square meter (g/m²) on both sides of the steel substrate. AZ150 is a common, robust specification for demanding applications. Higher numbers (AZ180, AZ200) offer even greater protection for extreme environments.
Q3: Can it be used for both roofing and wall cladding?
A3: Absolutely. Our Pre-Painted AluZinc Corrugated Sheets are engineered as a complete building envelope system. They are perfectly suited for both roofing (requiring weather tightness and UV resistance) and wall cladding (requiring durability and aesthetics), ensuring a consistent and high-performance appearance across the entire structure.
Q4: How does the thermal performance compare to other materials?
A4: The aluminium in the alloy coating makes it a highly reflective material. It can reflect a substantial portion of solar radiant heat, which helps reduce heat gain in buildings. This can lead to lower air-conditioning costs and improved energy efficiency, a key advantage in hot climates.
If you want to know more, please feel free to contact us.
