8011 O aluminum foil, coated with epoxy resin, forms a composite material that, due to its superior corrosion resistance and industrial adaptability, has become a core substrate in modern air conditioning heat exchanger manufacturing. The epoxy coated aluminum foil not only solves the corrosion problem of traditional aluminum foil in complex environments, but also through structural optimization and process innovation, provides a reliable guarantee for the long-term stable operation of air conditioning systems.
Specifications of the 8011 o epoxy coated aluminum foil used in air conditioning is:
Thickness: Generally between 0.03mm and 0.1mm; specific thickness can be customized according to customer needs.
Width: Typically between 100mm and 1500mm, flexibly adapting to different production requirements.
Tensile strength: Can reach 90-120MPa, ensuring stability and durability during use.
Coating: Employs a high-quality epoxy coating with excellent adhesion and corrosion resistance.
8011 aluminum foil belongs to the Al-Fe-Si alloy system. Its annealed (O temper) microstructure endows the material with unique physical properties: the thickness range is typically controlled between 0.03-0.1mm, ensuring sufficient strength while maintaining good flexibility. This “combination of rigidity and flexibility” allows it to withstand the stress of high-speed stamping during the manufacturing of air conditioner fins, while also enabling precise fin spacing control down to 0.1mm through precision forming processes. At the microstructural level, the grain size of the 8011-O aluminum foil for air conditioner is specially controlled, and combined with the solid solution strengthening effect of Fe and Si elements, a dense oxide film protective layer is formed. This natural barrier gives the aluminum foil excellent initial corrosion resistance in humid environments, laying a solid foundation for subsequent coating processes.
The application of epoxy resin coating constructs a second layer of protection for the 8011 aluminum foil. This bisphenol A type epoxy resin forms a three-dimensional network structure through a cross-linking reaction, and the benzene ring structure in its molecular chain endows the coating with excellent chemical stability. Experimental data shows that when the coating thickness is controlled at 3-8μm, it can continuously resist corrosion for more than 500 hours in salt spray tests, equivalent to a protection cycle of more than 10 years for air conditioners used in coastal areas. The coating process uses a composite technology combining roller coating and electrostatic spraying to ensure that the coating uniformly covers the micropores on the aluminum foil surface. The specially designed coating formula incorporates nano-sized silica particles. These particles, with a diameter of only 20-50 nm, not only enhance the coating’s wear resistance but also improve the aluminum foil’s UV reflectivity through a scattering effect, effectively delaying material aging.
In laboratory tests conducted by a well-known air conditioning brand, the 8011 O epoxy coated aluminum foil demonstrated remarkable environmental adaptability: after 2000 hours of continuous operation in a humid and hot environment of 85℃/85%RH, no corrosion bridging was observed between the fins. In accelerated corrosion tests under simulated acid rain conditions (pH=3.5), its corrosion resistance was more than three times that of ordinary aluminum foil. These data directly prompted the revision of industry standards, listing epoxy coated aluminum foil as a recommended material for high-corrosion-risk areas. In practical applications, after adopting this material in a data center air conditioning system, the heat exchanger maintenance cycle was extended from once every 3 years to once every 8 years, and the annual energy saving rate increased by 12%. More notably, the thermal conductivity of the coated aluminum foil is only 0.3 W/(m·K) lower than that of bare aluminum foil. This slight increase in thermal resistance is completely offset by the extended lifespan resulting from improved corrosion resistance, achieving a perfect balance between performance and reliability.
Currently, 8011-O epoxy coated aluminum foil, with its high corrosion resistance, lightweight nature, and excellent processing performance, has become an ideal material in the air conditioning industry. Compared to uncoated aluminum foil, coated aluminum foil has a significantly longer service life, reducing the frequency of maintenance and replacement, improving the cooling effect of air conditioners, lowering long-term operating costs, and meeting modern environmental protection and energy-saving requirements.
