800 T/M Phase 1 + 400 T/M Phase 2 Turnkey Sulfuric Acid Anodizing Production Line for Mobile Phone Housings with Type II Anodizing

This turnkey sulfuric acid anodizing production line is designed for manufacturers of aluminum mobile phone housings, including middle frames, back covers, and structural components. The project is configured in two phases: Phase 1 with 800 tons per month capacity, and Phase 2 with an additional 400 tons per month, supporting staged production ramp-up.

The line covers the complete process chain — from pre-treatment through Type II sulfuric acid anodizing, dyeing, and sealing — within a PLC-controlled automated system. Type II sulfuric acid anodizing is the mainstream process for aluminum surface treatment due to its low cost and high transparency.

Each stage is controlled by the central PLC system, with automated transfer between tanks. Rinse stages incorporate cascading counter-flow to reduce water consumption. The anodizing stage uses a rectifier with stable DC output, and electrolyte temperature is maintained within ±2°C by an industrial chiller system.

• Controlled Film Thickness: PLC system regulates current density and oxidation time to achieve target film thickness (8–20 μm typical for mobile phone housings)
• Automated Process Control: Central PLC system manages transfer sequences, tank temperatures, rectifier output, and chemical dosing with real-time data logging
• Batch Color Consistency: Automated electrolyte circulation and dye bath management maintain stable process conditions (Color difference ΔE ≤ 1.5 achievable)
• Temperature & Filtration Control: Industrial chillers maintain electrolyte temperature; continuous multi-stage micron filtration ensures bath clarity
• Flexible Surface Finishing: Supports interchangeable pre-treatment options and various dyeing/sealing methods
• Two-Phase Expansion Design: Phase 1 delivers 800 tons/month, Phase 2 adds 400 tons/month through additional tank modules and equipment
• Environmental Compliance Design: Closed-loop rinse water recycling, exhaust gas scrubbing, and wastewater treatment systems included

A typical line layout includes the following major equipment:

• Pre-treatment System (degreasing, etching, neutralization tanks)
• Anodizing Tank System with corrosion-resistant construction
• High-power DC Rectifier with stable current output
• Industrial Chiller System for temperature control
• Automated Transfer System (gantry crane or rail-mounted hoist)
• PLC Control Cabinet with touchscreen HMI
• Dyeing System with temperature control
• Sealing System (hot deionized water or nickel acetate)
• Filtration, Exhaust, Wastewater Treatment, and Drying Systems

For mobile phone housing applications, anodized film thickness is typically 8–20 μm with tolerance ±2 μm. The specific thickness is determined by required surface durability, color intensity, and dimensional tolerance.

The line supports mirror polishing, brushed finishing, matte, satin, and sandblasted pre-treatment options. For color, Type II anodizing produces a porous oxide layer that accepts organic and inorganic dyes in various colors including black, silver, gold, blue, and green.

Phase 1 delivers 800 tons per month capacity. Phase 2 adds 400 tons per month through additional tank modules, rectifier capacity, and transfer system units. The PLC control system supports unified management of both phases.

Lead time and installation schedule are confirmed based on project scope. Equipment manufacturing, shipment, installation, and commissioning proceed according to the project plan after design confirmation.

Capacity is calculated based on surface area per rack, racks per hour, and operating hours. The configuration scales through tank volume, crane throughput, and cycle time optimization. Actual throughput depends on component geometry and racking density.

The line supports common aluminum alloys used in mobile phone housings, including 6061, 6063, 5005 series, and high-purity 1000-series alloys for mirror finish applications.

Yes. The line is equipped with wastewater treatment and exhaust gas collection systems. Anodizing is an environmentally favorable process that generates no hazardous waste under EPA rules.

Every production scenario differs in component geometry, alloy mix, and throughput target. We provide customized line layouts and process solutions based on your specific requirements.

To receive a tailored proposal, please share:

• Component drawings or samples (material, dimensions, surface area per ton)
• Target film thickness and color requirements
• Required monthly throughput for Phase 1 and Phase 2
• Available factory space and utilities (power, water, drainage)
• Applicable environmental compliance requirements