The anti-corrosion epoxy-coated aluminum foil produced by Haomei Aluminum is a high-performance anti-corrosion material specially customized for the core components of condensers. The core is suitable for various types of equipment such as household air conditioners, commercial chillers, and automobile condensers. It can effectively solve the industry pain points of condensers being prone to corrosion and short life under harsh working conditions such as coastal high salt spray, industrial waste gas, and extreme temperature differences. It is a key core material to ensure the long-term stable operation of the condenser, improve equipment reliability, and reduce maintenance costs. Relying on precise production technology and strict quality control, anti-corrosion epoxy coated aluminum foil for condensers has reached industry-leading levels in terms of anti-corrosion performance, thermal conductivity efficiency, molding processing, etc. It takes into account practicality and adaptability, and can meet the needs of condensers in different regions and working conditions around the world.
Our epoxy-coated aluminum foil adopts a three-layer composite structure of substrate-conversion layer-epoxy coating. Each layer is precisely designed and strictly controlled to form all-round protection from the foundation to the surface.
– The base material is 8011-H22 alloy aluminum foil, in which the Fe content is controlled at 0.7-1.3% and the Si content is 0.6-1.0%. It not only ensures a high thermal conductivity of 190W/m·K, but also has excellent formability, which can meet the complex needs of condenser fin stamping. The thickness tolerance is strictly controlled within ±2μm to ensure subsequent processing accuracy.
– The chemical conversion layer undergoes chromate/chromium-free passivation treatment to form a dense oxide film of 0.2-0.5 μm, which greatly improves the adhesion between the coating and the substrate. It can reach level 0 standards through the 100-grid test, laying a solid foundation for subsequent anti-corrosion protection.
– The epoxy coating system is divided into a bottom layer and a top layer. The bottom layer uses a water-based epoxy primer with a film thickness of 1.5-2.0 μm. A modified amine curing agent is added with a curing degree of ≥95%. Its main function is to provide basic anti-corrosion performance and further enhance adhesion. The top layer is a weather-resistant epoxy topcoat with a film thickness of 2.0-3.0 μm. Nano-scale anti-rust pigments are added. Tested according to ASTM B117 standards, salt spray protection can last up to 1000-2000 hours. This composite structure enables the product to perform excellently in harsh environments such as coastal high salt spray and industrial waste gas, and its service life is 3-5 times that of ordinary coated aluminum foil.
We have established a standardized specification system covering mainstream condenser needs, and can also provide customized services according to customers’ specific working conditions.
The thickness of the aluminum foil is controlled at 0.08-0.2mm, and the tolerance is accurate to ±2μm, which is suitable for the stamping needs of various condenser fins such as household air conditioners and commercial chillers;
The total thickness of the coating is 3.5-5.0μm, with a tolerance of ±0.3μm, which can meet the requirements of different anti-corrosion levels of C3-C5.
The width of aluminum foil is 500-1250mm, the tolerance is ±1mm, and it can be adapted to fin molds of different specifications.
The roll diameter can be customized according to the customer’s automated production line requirements, ranging from 750-1500mm.
In addition, the tensile strength of the product is stable at 130-160MPa, and the elongation is ≥8%, which can ensure no breakage during the fin stamping process and smooth molding, meeting complex molding needs.
Based on customer data and our many years of production experience, anti-corrosion epoxy coated aluminum foil for condensers has five core advantages, taking into account both anti-corrosion performance and user experience.
First, it has the ultimate anti-corrosion performance and has no corrosion points through the 1000-hour neutral salt spray test (35°C, 5% NaCl). In coastal projects in Southeast Asia, it can extend the life of the condenser from 3 years to more than 8 years, significantly reducing equipment maintenance costs, and reducing maintenance costs by 60% compared with traditional products.
Secondly, to ensure the heat exchange efficiency, the thermal resistance of the coating is ≤0.0001m²·K/W, and the impact on the overall heat exchange efficiency of the condenser is less than 2%, which is far better than the industry average, and avoids the coating affecting the equipment operating efficiency.
Third, it has excellent molding and chemical resistance. The coating adhesion reaches the 100/100 standard. The fins are not peeled off or damaged after stamping. There is no abnormality after being soaked in 20% NaOH solution for 5 minutes. It can meet the requirements of the conventional cleaning process of the condenser and does not affect the service life of the product.
Fourth, the production process is stable. We use a coating line imported from Germany. The curing temperature is controlled at 180℃±5℃, and the production speed is 60-80m/min. The entire process is precisely controlled to ensure consistent performance of each roll of products. The annual production capacity reaches 8,000 tons, which can stably supply customers around the world.
Fifth, full-process quality control, from the procurement of aluminum foil substrates to the delivery of finished products, goes through 12 testing procedures, covering key indicators such as coating thickness, adhesion, salt spray testing, etc., and key indicators are 100% online tested. All exported products come with SGS/Intertek third-party certification, complying with EU RoHS and American ASTM standards, ensuring product compliance.
As a manufacturer of epoxy coated aluminum foil, we have accumulated experience. During the production process, we innovatively adopt the double coating and double drying process to effectively solve the industry pain point of uneven thickness of traditional coatings. Through the online coating defect detection system, the product defect rate is controlled below 0.05%. This is also the technical basis for us to provide global customers with a 10-year quality guarantee.
We firmly believe that a quality condenser starts with quality aluminum foil material. Haomei Aluminum’s anti-corrosion epoxy coated aluminum foil for condensers is not only the supply of materials, but also a technical commitment to the life and performance of the condenser. Welcome to contact our technical team to obtain exclusive material solutions for your working conditions.
