Epoxy phenolic aldehyde coated aluminum foil utilizes the high corrosion resistance of epoxy resin while a certain proportion of phenolic aldehyde resin is added to further improve its corrosion resistance. Compared to other ordinary anti-corrosion materials, we do not add any pigments to epoxy phenolic aldehyde for the color adjustment. The color of gold is naturally formed by utilizing the high-temperature color changing function of phenolic aldehyde resin. During the production, we strictly control the temperature and the thickness of the coating. By utilizing the plastic function of the coating, the fins are stretched without cracking during the production and stamping process. Meanwhile, the roller coating technique ensures that the coating thickness is very even, which makes the heat exchange efficiency of the air conditioning exchangers more effective. After nearly 10 years of observation by offshore wind power generation customers, and 6-7 years of application in sludge drying plants, there has been no corrosion occurred on our epoxy phenolic aldehyde coated aluminum foils so far. Compared to previous products, our third-generation epoxy phenolic aldehyde coated aluminum foil has not only increased the thickness of the coating film, but also adjusted the production process. The specific technical parameters are as follows:1. coating thickness on both sides ≥ 18um2. coating does not peel off after stamping by 50 kgs3. coating does not peel off by Baige Knife Test4. coating does not peel off by Organic Tin Test5. stamped areas do not corrode when soaked in 30% sodium hydroxide for 24 hours6. stamped areas do not corrode when soaked in the mixture of 20% copper sulfate and 10% hydrochloric acid for 24 hours7. no corrosion after 500 hours of acidic salt spray (ASS)8. according to the characteristics of the air conditioning industry, hydrophilic layers can also be added to the surface to ensure that there is no water accumulation between the fins