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AZ200 Ultra Heavy Coated Galvalume Steel Coil For Offshore Platform Structures
Product Details:
| Place of Origin: | China |
| Brand Name: | Huiyi-GL |
| Certification: | ASTM A792M, EN 10346, JIS G3321, ISO 9001 |
| Model Number: | DX51D+AZ |
| Document: | HUIYI CATALOGUE.pdf |
Payment & Shipping Terms:
| Minimum Order Quantity: | 25Tons |
|---|---|
| Price: | Negotiation |
| Packaging Details: | Exporting Packing with 3layers including the waterproof plastic film，Waterproof paper - plastic film-metal wrap. |
| Delivery Time: | 15-30 Days |
| Payment Terms: | L/C,D/P,T/T |
| Supply Ability: | 5000MT/Month |
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Detail Information |
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| Product Name: | Galvalume Steel Coil | Product Type: | Coil / Sheet / Strip |
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| Coating Weight: | 30-200g/㎡ | Coil Weight: | 3 - 8 Tons |
| Thickness: | 0.12 - 3.0mm | Width: | 600mm - 1500mm |
| Key Feature 1: | Dual-phase Protection: Aluminum Barrier + Zinc Sacrificial Protection | Key Feature 2: | 25–40 Year Maintenance-free Service Life In Mild Industrial Environments |
Product Description
Our AZ200 Ultra Heavy Coated Galvalume Steel Coil is engineered for offshore platforms and marine infrastructure, where extreme salt spray and moisture demand maximum protection. The AZ200 coating (200 g/m² double-sided, ~24 μm per side) features a 55% aluminum-zinc alloy (55% Al, 43–43.5% Zn, 1.5% Si) applied via continuous hot-dip process. This provides dual-phase protection: aluminum forms a dense oxide barrier against moisture and chlorides, while zinc offers sacrificial protection at cut edges. Under ASTM B117 salt spray testing, AZ200 achieves 480+ hours of corrosion resistance—significantly outperforming lighter coatings—and delivers 25–40 years of maintenance-free service in mild industrial environments, making it the specified choice for offshore and coastal infrastructure.
| Coating Composition | 55% Aluminum, 43.4% Zinc, 1.6% Silicon |
|---|---|
| Zinc Coating | AZ30 - AZ200 |
| Thickness | 0.12 - 3.0mm |
| Width | 600mm - 1500mm |
| Surface Treatment | Chromated Passivation, Oiled, Anti-Fingerprint |
| Spangle Finish | Regular / Minimized / Zero spangle |
| Heat Resistance | Up to 315°C continuous |
| Salt Spray Resistance (ASTM B117) | 480+ hours |
- Offshore Platform Structures: Primary material for topside modules, helidecks, living quarters, pipe racks, and support frames on oil and gas platforms, where resistance to seawater spray and marine atmosphere is critical.
- Coastal & Marine Facilities: Buildings at seaports, shipyards, dockside warehouses, and offshore platform support structures requiring maximum corrosion protection with minimal maintenance access.
- Bridge & Marine Infrastructure: Structural components for coastal bridges, causeways, and marine terminals exposed to salt spray, tidal action, and de-icing chemicals.
- Desalination & Power Plants: Critical infrastructure in coastal power generation and water treatment facilities where corrosion from seawater and industrial pollutants is relentless.
Triple-Shield Packaging: VCI anti-rust kraft paper inner layer, 0.3mm PE waterproof film with moisture indicators, steel-strapped pallets + edge guards (max. 8-ton coils).
Global Logistics: FOB/CIF from Chinese ports; 15-20 day delivery for Asia, 30-45 days globally.
Quality Assurance: Pre-shipment inspection and moisture indicators for transit protection.