High-Temperature Resistance and Applications of Aluminized Sheets

High-Temperature Resistance and Thermal Reflectivity of Aluminized Sheets

Thermal Radiation Reflectivity

Aluminized sheets effectively control, block, and reduce thermal radiation. In a short time, their reflectivity is comparable to pure aluminum and superior to galvanized steel sheets. Tests show that after four years outdoors, the thermal reflectivity of galvanized steel sheets drops to just 5%, absorbing almost all heat like a black body. In contrast, aluminized sheets retain 55% reflectivity, making them more durable in heat management applications.

Oxidation Resistance at High Temperatures

Aluminized sheets resist oxidation even at high temperatures. When heated to 510°C, the aluminum coating protects the steel sheet from oxidation and prevents discoloration. This makes it ideal for heat-resistant equipment exposed to corrosive condensates and combustion byproducts. Even at 510-677°C, while the aluminum-iron-silicon alloy darkens, the coating continues to protect the steel sheet. The steel base has a melting point of 1580°C, much higher than the 654°C melting point of aluminum, allowing it to last longer in fires. As a result, aluminized sheets help slow flame spread.

Advantages and Limitations

Aluminized sheets offer excellent durability but cost more than galvanized steel sheets. However, their longer service life makes them more economical over time. Their processing performance is slightly lower than galvanized steel, which can be a drawback in some applications. Many industries rely on a trusted aluminized supplier to ensure high-quality materials for various applications.

Applications of Aluminized Sheets and Steel Sheets

Aluminized sheets and steel sheets are widely used across industries due to their heat resistance and durability:

• Automotive: Exhaust systems, mufflers, and body parts.
• Furnaces: Heat exchangers, reflectors, oil tanks, baking boxes, furnace bodies, incinerators, chimneys, and dryers.
• Containers: Refrigerated containers, special oil tanks, storage tanks, and water heaters.
• Buildings: Roofs, window frames, wall panels, outdoor structures, cabinets, household appliances, lamps, billboards, and open-air facilities.

For industries requiring steel sheet solutions with heat resistance and corrosion protection, sourcing from a reliable aluminized supplier ensures product longevity and performance.