500 Tons/Month Fully Automatic Solar Frame Anodizing Production Line for Bronze Champagne Black Colors

This solution presents a fully automatic aluminum anodizing production line with a stable output of 500 tons per month, exclusively designed for surface treatment of solar panel aluminum frames. The line is tailored for 6063 and 6061 photovoltaic-grade aluminum profiles, supporting standardized mass production of three mainstream colors: bronze, champagne, and black.

Adopting a vertical hanging continuous operation structure, the production line supports both large-batch standardized production and flexible small-batch customized color switching. With highly uniform anodized film, precise color difference control and outstanding outdoor weather resistance, it fully complies with international photovoltaic industry standards and meets the long-term anti-corrosion, appearance consistency and high-stability requirements for solar frame outdoor applications.

• Designed Monthly Capacity: 500 tons (based on 26 working days and dual-shift operation; average daily output: 19.2 tons)
• Processing Workpieces: Photovoltaic solar aluminum frame profiles with standard lengths of 6-8 meters
• Available Finishing Colors: Champagne, bronze, matte black (adopts electrolytic coloring technology for fade resistance and zero batch color difference)
• Anodized Film Thickness: Standard 8-12 μm for solar frames; customizable thick film 12-15 μm; qualified for 72-hour neutral salt spray testing
• Operation Mode: Fully automatic gantry hanging conveying system, supporting single-color mass production and fast three-color model switching

This production line adopts industry-standard sulfuric acid anodizing + electrolytic coloring technology. Different from conventional organic dyeing, electrolytic coloring forms stable metal compound deposition layers inside oxide film pores, delivering higher substrate adhesion, superior UV resistance and long-term weather resistance.

The finished frames can withstand 25 years of outdoor exposure without fading, blooming, peeling or cracking. The entire production process adopts multi-stage graded water rinsing and closed-loop pure water circulation treatment, effectively eliminating cross-contamination, surface watermarks, stains and color inconsistency to ensure high and stable product qualification rate.

The production workflow adopts a standardized and optimized combination of professional pre-treatment, independent electrolytic coloring and integrated post-sealing processes, targeting the unique coloring characteristics of champagne, bronze and black solar frames.

1. Loading
2. Degreasing & Oil Removal
3. Water Rinsing
4. Alkali Etching & Deashing
5. Water Rinsing
6. Acid Neutralization & Purification
7. Water Rinsing
8. Optional Surface Matte Finishing
9. Pure Water Rinsing
10. Low-Temperature Sulfuric Acid Anodizing
11. Pure Water Rinsing
12. Surface Activation
13. Independent Electrolytic Coloring (Champagne / Bronze / Black)
14. Water Rinsing
15. High-Temperature Hot Sealing
16. Hot Water Cleaning
17. Constant Temperature Drying
18. Quality Inspection
19. Finished Product Packaging

• Degreasing & Oil Removal: Weak alkaline degreasing agent; working temperature: 50-55℃; processing time: 8-10 minutes
• Alkali Etching & Deashing: Sodium hydroxide-based solution; working temperature: 45-50℃; processing time: 3-5 minutes
• Acid Neutralization & Purification: Nitric acid neutralizing solution; room temperature; processing time: 2-3 minutes
• Sulfuric Acid Anodizing: Sulfuric acid concentration: 180-200 g/L; constant temperature: 18-22℃; DC constant voltage: 16-18 V; oxidation time: 25-35 minutes
• Precision Electrolytic Coloring: Adopts professional metal salt electrolytic systems with constant temperature and constant current control
• High-Temperature Sealing Treatment: Pure water sealing process; temperature: 95-98℃; sealing time: 10-12 minutes
• Constant Temperature Drying: Hot air circulating drying; temperature: 60-80℃; drying time: 15 minutes

This fully automatic anodizing line is equipped with a high-precision gantry hanging conveying system, perfectly matching 6-8 meter long solar aluminum frame profiles. It adopts three independent dedicated coloring tanks for champagne, bronze and black respectively, realizing fast color switching without tank cleaning.

The complete supporting systems include constant temperature control, high-precision DC rectification, pure water supply and environmental protection waste treatment, ensuring long-term stable mass production, consistent product quality and full environmental compliance.

All process tanks are fabricated with thick industrial anti-corrosion PP plates, featuring acid and alkali resistance, anti-aging performance and zero leakage. Each functional tank is equipped with professional circulating filtration, automatic stirring and constant temperature control devices to stabilize tank solution indicators.

• Degreasing Tank ×1: Equipped with heating and circulating filtration system
• Alkali Etching Tank ×1: Installed with constant temperature control and exhaust device
• Neutralization Tank ×1: Rapidly neutralizes residual alkaline components
• Multi-Stage Water Rinsing Tanks ×6: Graded tap water and pure water rinsing design
• Special Anodizing Tank ×1: Low-temperature professional oxidation tank with industrial chiller
• Independent Coloring Tanks ×3: Dedicated exclusive tanks for champagne, bronze and black colors
• High-Temperature Sealing Tank ×1: Pure water hot sealing tank with precise constant temperature control
• Hot Air Drying Oven ×1: Circulating hot air constant temperature drying equipment