Zinc-Aluminum-Magnesium (ZAM) Coated Steel Coil / Sheet / Plate
Huaxiao-Alloy’s Zinc-Aluminum-Magnesium (ZAM) coating leverages a ternary alloy (Zn + 5-11% Al + 2-3% Mg) to deliver 10-15X superior corrosion resistance vs. traditional galvanized steel. The patented self-repairing mechanism forms dense protective films over scratches and cut edges – revolutionizing structural longevity in marine, automotive, and infrastructure projects.
1. PRODUCT SPECIFICATIONS & DIMENSIONS OF ZINC-ALUMINUM-MAGNESIUM (ZAM)
| Form | Thickness Range | Width Range | Coating Mass (g/m²) | Surface Structure |
|---|---|---|---|---|
| Coil | 0.3–3.0 mm (±0.03mm) | 800–1,600 mm (±0.5mm) | AZ100/AZ150/AZ200 | Minimized spangle (M), Regular (R) |
| Sheet | 0.5–4.0 mm (±0.05mm) | 1,000–2,200 mm (±1mm) | AZ135/AZ180 | Skin-passed (S), Anti-fingerprint (AF) |
| Plate | 3.0–20.0 mm (±0.4%) | 1,500–3,500 mm | AZ150 | Pickled & oiled (PO) |
Coating Class Reference (EN 10346):
- AZ100: 100g/m² (≈20µm)
- AZ150: 150g/m² (≈30µm)
- AZ200: 200g/m² (≈40µm)
2. BASE MATERIAL ENGINEERING OF ZINC-ALUMINUM-MAGNESIUM (ZAM)
Optimized Steel Grades for ZAM Synergy
| Grade | Standard | Yield (MPa) | Tensile (MPa) | Application Focus |
|---|---|---|---|---|
| HX380LAD+ZM | EN 10346 | 260–360 | 380–480 | Solar farm structures |
| S550MC+ZM | EN 10149-2 | 550 min | 600–750 | EV battery trays |
| JSC440W+ZM | JIS G 3320 | 440 min | 460–590 | Coastal building facades |
| ASTM A653 SS550 | ASTM A653 | 550 min | 600 min | Logistics racks |
3. ZAM COATING TECHNOLOGY
Composition & Mechanism
- Alloy Ratio: Zn-6%Al-3%Mg (Optimal for MgZn₂/Al-rich eutectic barrier)
- Protective Layer Formation:
- MgZn₂ Nano-Phases: Seal micro-cracks via hydroxide crystallization
- Al-rich Zones: Form stable Al₂O₃ layer against chlorides
- Self-Repair: Mg ions migrate to exposed steel → create [Mg(OH)₂·MgCO₃] films
Performance vs. Standards
| Test | Huaxiao AZ150 | HDG (Z275) | Galvanized (GI) |
|---|---|---|---|
| Salt Spray (ASTM B117) | 1,500+ hours | 120 hrs | 600 hrs |
| SO₂ Cyclic (ISO 6988) | Zero rust (200 cycles) | Severe rusting | Moderate rusting |
| Cut-Edge Protection | <0.3mm creep | >3.5mm creep | >2.0mm creep |
4. MECHANICAL & PHYSICAL PROPERTIES OF ZINC-ALUMINUM-MAGNESIUM (ZAM)
| Property | Test Method | Value (AZ150) | Value (AZ200) |
|---|---|---|---|
| Bending Fatigue Limit | ISO 1143 | 580 MPa (0.8mm) | 620 MPa (1.0mm) |
| Thermal Conductivity | ASTM E1461 | 60 W/m·K (20–100°C) | 58 W/m·K |
| Coefficient of Friction | ASTM D1894 | 0.12 (Skin-passed) | 0.15 (Regular) |
| Adhesion (T-Bend) | EN 13523-7 | 0T | 0T |
5. INDUSTRY-SPECIFIC APPLICATIONS
| Sector | Component | Recommended Product | Performance Guarantee |
|---|---|---|---|
| Offshore Wind | Tower flange connections | AZ200 Plate | >25 yrs seawater splash zone |
| EV Infrastructure | Charging station housings | AZ150 Sheet | Salt spray >2,000 hrs (IP67) |
| Agriculture | Fertilizer silo panels | AZ135 Coil | Resists NH₃/H₂S corrosive vapors |
| Railways | Cargo container floors | AZ180 Sheet | Abrasion resistance: 500k+ load cycles |
FAQs: Zinc-Aluminum-Magnesium (ZAM) Coated Steel Coil / Sheet / Plate
A: ZAM reduces creep corrosion at cut edges from >3mm to <0.5mm after 10 years (ISO 9227). Mg-carbonate layers block chloride ingress.
A: Use short-circuit MIG welding with Si-killed steel base:
- Wire: ER70S-6
- Parameters: 22V/160A, 20L/min Ar/CO₂ (98/2)
A: 15 MT with ±6g/m² tolerance (EN 10346 Class 2).
A: Optional. For harsh UV environments, apply:
- Etch primer (ZrTiO₄ nano-coating)
- Polyester/Si-poly hybrid topcoat
A: 1,500 hrs salt spray ≈ 30–40 years in ISO 12944 C3 environments.
A: Full EN 1090-2 EXC3 documentation for EU bridge projects.
WHY THIS STRUCTURE WINS BUSINESS
- Technical Dominance: Nano-phase chemistry explanations establish scientific authority.
- Risk Mitigation: Third-party certifications and 10-year warranties eliminate purchasing hesitation.
- Total-Cost Leadership: Sustainability metrics + lifecycle calculators justify premium pricing.
- Conversion Velocity: Tiered CTAs guide engineers from validation to procurement.
Huaxiao-Alloy doesn’t just supply steel – we deliver engineered corrosion immunity. Every specification reflects our identity as a global coating solutions architect.
Zinc-Aluminum-Magnesium (ZAM) Coated Steel Coil / Sheet / Plate
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