55% Aluzinc AZ100 Galvalume Steel Sheet For Stone Coated Metal Tiles

1. Production Process of Aluzinc Steel Coils

1. Preparation:

- Steel Cleaning: Similar to the galvanized process, the steel strip is cleaned to remove impurities.

- Annealing: The steel is annealed in a furnace to achieve the desired mechanical properties and surface condition for coating.

2. Aluzinc Coating:

- Hot-Dip Process: The annealed steel strip is passed through a molten bath containing a mixture of aluminum (55%), zinc (43.4%), and silicon (1.6%) at a temperature of around 600°C (1112°F). This unique combination creates a coating that offers enhanced corrosion resistance.

- Air Knives: As in the galvanized process, air knives are used to remove excess coating and achieve the desired thickness.

3. Cooling and Finishing:

- Cooling: The coated strip is cooled to solidify the Aluzinc coating.

- Passivation and Oiling: The strip may undergo additional treatments such as passivation or oiling to further improve corrosion resistance and surface quality.

- Inspection and Recoiling: The finished Aluzinc steel strip is inspected and recoiled for shipment.

Key Differences

1. Coating Composition:

- Galvanized Steel: Coated with pure zinc.

- Aluzinc Steel: Coated with a mixture of aluminum, zinc, and silicon.

2. Coating Bath Temperature:

- Galvanized Steel: Approximately 460°C.

- Aluzinc Steel: Approximately 600°C.

3. Corrosion Resistance:

- Galvanized Steel: Zinc provides a sacrificial layer that protects the steel by corroding first.

- Aluzinc Steel: The combination of aluminum and zinc offers superior corrosion resistance, with aluminum forming a protective oxide layer and zinc providing sacrificial protection.

4. Thermal Reflectivity and Heat Resistance:

- Galvanized Steel: Moderate thermal reflectivity and heat resistance.

- Aluzinc Steel: Higher thermal reflectivity and can withstand higher temperatures, making it suitable for applications where heat resistance is important.

Summary

The primary differences between the production processes of Aluzinc steel coils and galvanized steel coils lie in the composition of the coating and the temperature of the coating bath. Aluzinc steel coils are coated with an aluminum-zinc-silicon alloy, which provides superior corrosion resistance, better heat reflectivity, and improved durability compared to the zinc coating used in galvanized steel coils. These enhanced properties make Aluzinc steel coils particularly suitable for more demanding applications and environments.

2. Application in Stone-Coated Metal Roof Tiles

1. Base Material:

- Substrate:

Aluzinc steel serves as the base material for stone-coated metal roof tiles. Its strength and formability make it ideal for creating durable and lightweight roofing panels.

2. Stone Coating:

- Adhesion:

The coating process involves applying a layer of adhesive to the Aluzinc steel substrate, followed by embedding stone granules. The excellent adhesion properties of Aluzinc steel ensure that the stone granules remain securely attached, even under harsh weather conditions.

3. Protective Layers:

- Multi-layer Protection:

After the stone granules are applied, a clear acrylic overcoat is added to protect the stones and enhance UV resistance. The combination of Aluzinc steel and multiple protective layers provides a robust barrier against environmental damage.

4. Versatile Designs:

- Aesthetic Options:

Stone-coated metal roof tiles come in various styles, colours, and textures, allowing homeowners and builders to choose designs that complement different architectural styles. Aluzinc steel’s ability to hold coatings well enhances the variety and vibrancy of these options.

Advantages for the Stone-Coated Metal Roof Tile Industry

1. Cost-Effectiveness:

- Long-Term Savings:

While Aluzinc steel may have a higher initial cost compared to galvanised steel, its longer service life and reduced maintenance needs result in overall cost savings.

2. Environmental Benefits:

- Sustainability:

The extended lifespan and recyclability of Aluzinc steel contribute to environmental sustainability. Reducing the frequency of roof replacements and the associated waste makes Aluzinc a more eco-friendly choice.

3. Performance in Extreme Conditions:

- Weather Resistance:

Aluzinc steel’s superior performance in extreme weather conditions, including high UV exposure, heavy rain, and snow, makes it an ideal choice for roofing applications in diverse climates.

Conclusion

Aluzinc steel coil is the preferred material for stone-coated metal roof tiles due to its superior corrosion resistance, thermal reflectivity, aesthetic appeal, and longer service life. These characteristics make it a more cost-effective and durable option compared to galvanised steel, ensuring that roofs made from Aluzinc-coated tiles can withstand harsh environmental conditions while maintaining their appearance and structural integrity.