7072 aluminum foil belongs to the 7000 series aluminum alloys, with aluminum (Al) as the base metal and zinc (Zn) as the main alloying element. It is a typical corrosion-resistant aluminum alloy foil. The most prominent characteristics of this material are its excellent corrosion resistance and sacrificial anode protection effect, making it widely used as a cladding layer for aluminum alloy materials.
Specifications
| Item | Specification |
|---|---|
| Alloy | 7072 |
| Aluminum Series | 7000 Series |
| Main Elements (Abbreviation) | Al, Zn |
| Typical Chemical Composition | Al: Balance; Zn: 0.8–1.3%; Fe, Si ≤ 0.5% |
| Temper | O (Soft, most common) |
| Thickness Range | 6 – 200 μm |
| Common Thickness | 20 / 30 / 50 μm |
| Width | Customizable (commonly ≤ 1250 mm) |
| Surface Finish | Bright / Matte |
| Supply Form | Coil |
Description
Features
- Excellent Corrosion Resistance
Designed especially for atmospheric and marine environment. Forms a stable oxide layer that protects surfaces and enhances durability.
- Low Electrode Potential
Has a relatively low electrode potential that makes it suitable as a protective cladding on other alloys (sacrificial protection).
- Good Heat Transfer & Thermal Properties
High thermal conductivity makes it suitable for heat-exchanger and heat-dissipation applications (e.g., HVAC fin stock).
- Good Surface Quality
Foils are produced with smooth, defect-free surfaces (no oil spots, scratches, etc.) — important for consistent heat exchange and corrosion behavior.
- Formability & Workability
Available in soft (O) and cold-worked (H) tempers to balance ductility and strength, allowing manufacturing into thin foils and fin shapes.
- Strength & Mechanical Properties
While not as strong as structural aluminum alloys, 7072 foil offers adequate strength and durability for its intended roles in heat-exchanger components.
Common Applications
- Automotive Heat Exchangers
Used as cladding for radiators, condensers, and evaporators to enhance overall corrosion resistance.
- Industrial Heat Exchange Equipment
Suitable for industrial cooling systems, air-conditioning heat exchangers, and other equipment requiring high corrosion resistance.
- Aluminum Alloy Cladding Materials
Commonly clad with alloys such as 3003, 3005, and 6061 to provide sacrificial anode protection.
- Refrigeration & HVAC Systems
Applied in heat exchange components of commercial refrigeration and HVAC systems.
- Other Anti-Corrosion Applications
Ideal for aluminum composite materials used in humid, salt-spray, or corrosive environments.
