1050 Aluminum Coil

1050 alumimum coil is a product in the pure aluminum plate series. Its chemical composition and mechanical properties are similar to those of the 1060 series products. It is basically replaced by 1060 in current applications. The last two Arabic numerals of the 1050 series are 50. According to the international brand naming principle, the aluminum content must reach 99.5% or more to be a qualified product. my country's aluminum alloy technical standard (GB/T3880-2006) also clearly stipulates that the aluminum content of 1050 must reach 99.5%. Since it does not contain other technical elements, the production process is relatively simple and the price is relatively cheap. It is currently the most commonly used series in conventional industries. Industrial pure aluminum has the characteristics of high plasticity, corrosion resistance, good electrical conductivity and thermal conductivity, but low strength, no heat treatment strengthening, poor machinability, and can accept contact welding and gas welding.

I. Core Characteristics

Material Composition

Aluminum content of ≥99.5%, it is industrially pure aluminum (Series 1), with impurities primarily consisting of iron and silicon.

Density: 2.71 g/cm³, with electrical and thermal conductivity close to that of pure aluminum.

Physical Properties

Elongation can reach 25%, with excellent plasticity but low strength (tensile strength 60-100 MPa).

Corrosion resistance is high, and a dense oxide film easily forms on the surface.

Processing Characteristics

It cannot be hardened by heat treatment; hardness can only be increased through cold working (e.g., H18 temper).

Suitable for forming processes such as stamping and drawing, but has poor machinability.

II. Common Specifications

Thickness Range

Conventional thickness: 0.1-6.0 mm (ultra-thin foil can be as thin as 0.006 mm). Special Requirements: Hot-rolled plates can be produced in thicknesses of 8-500mm.

Widths and Finishes

Standard Widths: 20-2650mm (custom slitting available).

Supply Forms: A full range of grades, including O (soft) and H14/H18 (hardened).

III. Main Applications

Packaging and Electronics

Food aluminum foil (0.006-0.2mm), capacitor casings.

Electronic heat sinks, electromagnetic shielding layers.

Construction and Industry

Curtain wall decoration, chemical container linings.

Lamp reflectors, road signs.

IV. Purchasing Recommendations

Parameter Matching

A thickness of 0.5-1.5mm is preferred for construction applications, while ultra-thin specifications are required for packaging.

Surface treatment options include anodizing or fluorocarbon spray coating (for outdoor weather resistance).

Quality Verification

Check surface finish and thickness tolerance. Request a Material Testing Certificate (MTC) to ensure compliance with ingredient standards.

1050 aluminum coil, with its high cost-effectiveness and processability, has become a versatile industrial base material.

I. Core Process

Pretreatment Phase

Degreasing: Soak in a 60°C alkaline solution (pH 10-12) for 5-8 minutes to remove surface grease and impurities.

Alkaline Cleaning: Soak in a 5% sodium hydroxide solution for 1-3 minutes to remove the natural oxide film and prevent excessive corrosion.

Neutralizing Pickling: Soak in a 30% nitric acid solution for 1 minute to neutralize residual alkaline.

Anodizing Phase

Electrolysis Parameters: Sulfuric acid electrolyte (180-200g/L), voltage 12-20V, current density 1.2-1.8A/dm², time 30-60 minutes.

Temperature Control: The bath temperature must be maintained at a stable 18-22°C. Cool if above 25°C.

Post-Processing Stage

Dyeing (optional): Soak in organic dye at 40-60°C for 10-30 minutes. Dark colors require multiple dips.

Sealing: Use hot water (95°C) or a nickel salt solution to seal and improve corrosion resistance.

II. Key Control Indicators

Film Thickness: 10-20μm. Adjust the current/time for thicker films.

Electrolyte Concentration: 180-200g/L sulfuric acid. Regularly replenish and filter the solution.

Dyeing Uniformity: ΔE color difference <1.5. Strengthen pretreatment water quality control.

III. Typical Problems and Solutions

Whitening of the film: Reduce the current density or electrolyte temperature to below 20°C.

Uneven Dyeing: Check pretreatment cleanliness and use deionized water to mix the dye.

Film Peeling: Use nickel salt sealing and control the drying temperature to ≤60°C.

IV. Safety and Environmental Requirements

Wear goggles and acid-resistant gloves during operation. Wastewater must be neutralized to a pH of 6-9 before discharge (refer to GB 8978-1996).

Anodizing 1050 aluminum coil requires strict control of pretreatment and electrolysis parameters. Its high-purity aluminum properties result in an oxide film with superior uniformity compared to alloy aluminum.