Hot-dip Galvanized Steel Coil

Hot-dip aluminized zinc plated steel coil, also known as Galvalume or Aluzinc coil, is a plated product formed by dipping a steel strip into a bath of molten metal containing specific proportions of aluminum, zinc and small amounts of silicon. The following are its detailed characteristics:

Plating composition: typically contains 55% aluminum, 43.5% zinc, and about 1.5% silicon, and this ratio provides excellent corrosion resistance, two to six times greater than pure galvanized products.

Manufacturing process: Involves pickling to remove surface oxides, cleaning, and then hot-dip plating at elevated temperatures through a zinc-aluminum mixture. Post-plating may include steps such as air-cooling, water quenching, leveling, straightening and passivation to enhance its performance and appearance.

Applications:Widely used in the construction industry, such as roofing and wall panels, as well as home appliances, automobile manufacturing, agricultural equipment, communication facilities, etc., and favored for its excellent weather resistance and aesthetics.

Specification parameters:

Thickness is generally between 0.15mm and 1.5mm.

Width can be customized, commonly from 800mm to 1250mm.

Coating weight (Zn+Al) typically ranges from 30g/m² to 150g/m², customized according to usage requirements.

Surface treatments can include fingerprint free treatment, passivation for fingerprint resistance and aesthetics.

Performance Characteristics:

CORROSION RESISTANCE: Improved protection in humid and chemically corrosive environments due to the addition of aluminum.

Heat Reflectivity: The high reflectivity of aluminum helps to reduce heat absorption for applications requiring good thermal management.

Weldability and machinability: Good weldability and machinability adaptability for a wide range of manufacturing processes.

Cutting Edge Protection: Better protection of cutting edges than single zinc coatings, reducing the formation of corrosion spots.

Environmental suitability: excellent durability in maritime climates, industrial pollution and rural environments.

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