Rust-proof packaging materials are used for rust protection during the storage and transportation of steel coils such as cold-rolled steel sheets, pickled steel plates, and hot-rolled steel sheets. They are primarily composed of rust-inhibiting paper, corrosion inhibitors, polyethylene, and plastic woven fabric. These materials offer excellent vapor-phase and contact rust prevention properties, as well as high physical protection, making them a widely used functional packaging material for steel plates and coils both domestically and internationally.