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Is hard anodized cookware safe? It is safe. After hard anodizing treatment of aluminum, it will cover the surface of aluminum with a layer of 50-80um thickness of hard anodizing film, in fact, aluminum under normal circumstances will produce a layer of oxide film, but this film is relatively thin, only 2-3 nanometers, and through anodizing can reach 0.5-25 microns, Films achieved by hard anodizing can reach 25-150 microns. We can see that the hard anodizing treatment can greatly improve the thickness of the film, but also improve the hardness and corrosion resistance of aluminum
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