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The materials used for metal packaging cans vary depending on the application. Typically, metal packaging cans are made of materials such as tinplate, aluminum, and tin-free steel (TFS). Each of these materials has different properties and is suitable for different packaging needs.

Rust-prone metal packaging cans: 1. Ordinary iron cans 2. Carbon steel cans Rust-resistant metal packaging cans: 1. Aluminum cans 2. Stainless steel cans 3. High-quality tinplate cans

The protective effect of the tin layer is limited, especially when storing acidic foods, where there is a risk of tin corrosion. Therefore, during the production process, a protective coating or lining is often added to the inner surface of tinplate cans to further prevent direct contact between food and metal.