ZAM Coated Steel Racking

ZAM (Zn-Al-Mg) Coated Steel Racking System

Product Overview

Our zam zinc-aluminum-magnesium (Zn-Al-Mg) coated racking uprights are made from high-strength steel with a Zn-Al-Mg alloy coating, offering superior corrosion resistance, high load capacity, and extended lifespan. Ideal for warehousing, industrial shelving, automated storage systems, and more, ensuring a stable and durable support structure.

Key Benefits

✅ Exceptional Corrosion Resistance – ZAM coating provides 3-5x better rust protection than standard galvanized steel, ideal for humid or high-salt environments.
✅ High Load Capacity – Made from high-tensile cold-rolled steel, with upright thickness options of 1.5mm–3.0mm, supporting up to 5,000kg per shelf level.
✅ Longer Lifespan – Self-healing coating properties reduce rust risk, ensuring 15-20 years of service life.
✅ Lightweight Design – 10% lighter than traditional steel uprights, reducing shipping and installation costs.
✅ Eco-Friendly – Chromium-free passivation, compliant with RoHS environmental standards.

Ideal Applications

✔ Warehousing & Logistics – E-commerce fulfillment centers, cold storage, automated AS/RS systems
✔ Industrial Shelving – Heavy-duty racks, narrow-aisle racks, shuttle racks
✔ Harsh Environments – Coastal areas, high-humidity factories, chemical storage
✔ Global Export – Compliant with ISO 9001, SGS certifications

Technical Characteristics

1. Coating Composition and Structure

• Alloy Composition: Primarily zinc (Zn), with added aluminum (Al, 1.5-11%) and magnesium (Mg, 1-3%), forming a dense ternary eutectic structure.

• Self-Healing Properties: When the coating is damaged, oxides of aluminum and magnesium quickly form a protective film to prevent rust spread.

• Microscopic Features:

• Uniformity: More uniform than traditional zinc coatings, reducing porosity.

• Adhesion: Strong bonding with the steel substrate, resistant to mechanical damage (e.g., scratches).

2. Corrosion Resistance Mechanism

• Cathodic Protection: Zinc acts as a sacrificial anode to protect the steel substrate.

• Barrier Effect: Oxides of aluminum and magnesium (Al₂O₃, MgO) form a dense passive layer, blocking moisture and chloride penetration.

• Salt Spray Test Performance:

• Traditional Hot-Dip Galvanizing (HDG): Red rust appears after 500 hours.

• Zinc-Aluminum-Magnesium (Zn-Al-Mg): No red rust after 1000-1500 hours (3-5x improvement).

3. Physical Properties

• Hardness: Higher coating hardness (~150-200 HV), resistant to wear.

• Ductility: Suitable for stamping, bending, and other processes without coating peeling.

II. Core Advantages

1. Extended Lifespan

• Outdoor/Harsh Environments: Service life of 15-20 years (compared to 5-8 years for traditional galvanizing).

• Reduced Replacement Frequency: Ideal for long-term storage infrastructure investments.

2. Cost Efficiency

• Initial Cost: 10-20% higher than HDG, but lower lifecycle costs (less maintenance/replacement).

• Lightweight Design: 10% lighter for the same strength, reducing transportation and installation costs.

3. Environmental Compliance

• Chromium-Free Treatment: Compliant with RoHS, REACH, and other international environmental standards.

• Recyclability: Coating and steel substrate are 100% recyclable.

III. Typical Applications

1. High-Humidity/Corrosive Environments

• Cold Chain Logistics: Freezer warehouses (-30°C), seafood processing plants.

• Coastal Areas: Port storage, offshore platform equipment.

• Chemical Industry: Shelving or equipment supports in acidic/alkaline environments.

2. Heavy-Duty Storage Systems

• Automated Storage and Retrieval Systems (AS/RS): High-frequency access requiring long-term stability.

• Narrow-Aisle Racking: Scenarios with stringent demands on upright strength.

3. High-End Industrial Needs

• Food and Pharmaceuticals: Chromium-free passivation for cleanliness requirements.

• Automotive Manufacturing: Stamped parts, body structures (balancing corrosion resistance and lightweighting).

FAQ (Frequently Asked Questions)

Q1: Are Zn-Al-Mg racks more durable than standard galvanized racks?
✅ Yes! The ZAM coating offers 3-5x better corrosion resistance, making it perfect for humid or salty conditions.

Q2: What’s the maximum load capacity?
✅ Depends on thickness—3.0mm uprights support up to 5,000kg per level. Custom high-capacity solutions available.

Q3: Can these racks handle freezing temperatures?
✅ Yes, they withstand -30°C, making them ideal for cold storage & freezer warehouses.

Q4: Do you offer custom sizes?
✅ Absolutely! We customize height, thickness, hole patterns, and more to fit your storage needs.

Q5: Are Zn-Al-Mg racks more expensive than standard racks?
✅ Initial cost is 10-20% higher, but longer lifespan & lower maintenance make them more cost-effective long-term.