Anodized aluminum reflector sheets are aluminum treated through anodizing and mirror polishing process, resulting in excellent reflective properties and corrosion resistance. Anodizing is an electrochemical process that forms a dense aluminum oxide film on the aluminum surface, enhancing its wear resistance and oxidation resistance.
Alloys of Anodized Aluminum Reflector Sheet
- Pure Aluminum Series (1××× Series)
Representative Models: 1050, 1070, 1085
Properties: Aluminum content ≥99%, excellent conductivity and corrosion resistance, but lower strength, making them suitable for applications requiring high flatness (such as precision optical reflectors).
Applications: Indoor lighting reflectors, solar collectors.
- Aluminum-Magnesium Alloy Series (5××× Series)
Representative Models: 5052, 5005
Properties: 3-5% magnesium content, 30% increased strength, and significantly enhanced weather resistance, making them suitable for outdoor environments.
Applications: Architectural curtain walls, automotive headlights.
Thickness Parameters of Anodized Aluminum Reflector Sheet
- Substrate Thickness
General Range: 0.5mm-5.0mm, including:
0.5mm-1.5mm: for electronic equipment and interior decoration;
2.0mm-5.0mm: for building curtain walls and traffic signs.
- Oxide Film Thickness
Ordinary Oxidation: 5-10μm, suitable for indoor environments, with a salt spray resistance of 500-1000 hours;
Hard Oxidation: ≥25μm, suitable for coastal/industrial areas, with a salt spray resistance exceeding 3000 hours.
Abrasion Resistance: Wear resistance increases approximately 30% for every 10μm increase in film thickness.
Colors of Anodized Aluminum Reflector Sheet
- Solid Colors: Silver, Gold, Black (achieved through electrolytic coloring);
- Metallic Colors: Titanium, Rose Gold, Champagne (by adding organic dyes or metal salts).
Process Flow of Anodized Aluminum Reflector Sheet
Pretreatment: Degreasing → Alkali Etching → Neutralization → Polishing (Mechanical/Chemical);
Anodizing: In sulfuric acid electrolyte, voltage 14-18V, time 20-60 minutes;
Coloring: Electrolytic coloring (penetration type) or dye immersion (adsorption type);
Sealing: Hot water sealing or nickel salt sealing to improve corrosion resistance.
Features of Anodized Aluminum Reflector Sheet:
- High Reflectivity: After anodizing, the aluminum surface is smooth and has high reflectivity, making it suitable for optical equipment and lighting reflectors.
- Corrosion Resistance: The oxide film effectively prevents aluminum from oxidation, extending its service life in humid or corrosive environments.
- Aesthetics: Anodizing can create a variety of colors and textures on the aluminum surface, enhancing the product's aesthetics.
- Wear Resistance: The oxide film's high hardness improves the aluminum's wear resistance.
Typical Application
- Architecture
Curtain Wall Decoration: mirrored aluminum composite panels with a reflectivity of 92% and energy savings of 30%;
Indoor Ceiling: The platform roof of uses anodized aluminum sheets with a 10-year weather resistance.
- Lighting and Energy
LED Reflectors: Super-mirror aluminum sheets offer a reflectivity of 95%, increasing light efficiency by 20%;
Solar Thermal Collectors: 5052 anodized aluminum mirror sheets with a stable heat absorption efficiency of over 85%.
- Transportation and Electronics
Automotive Lampshades: Hard anodized mirror aluminum sheets are stone-impact resistant and have a lifespan of 10 years;
Mobile Phone Middle Frames: Rose gold anodized aluminum sheets with a wear resistance that has passed 1,000 steel wool tests.
- Special Environments
Chemical Equipment: The 25μm oxide film is resistant to acid and alkali corrosion and is suitable for offshore platforms;
Medical Equipment: After sterilization, it is used in surgical light reflector systems.
When processing and using anodized aluminum reflector sheet, avoid scratches and collisions to prevent damage to the surface oxide film.