Rust is the reddish-brown substance that forms on iron when it corrodes., Oxidation is a chemical process where metal reacts with oxygen and water., Moisture is water in the air that speeds up rusting., Salt can make rusting happen faster., Painting and oiling are examples of prevention methods to stop rust., Humidity, or moisture in the air, makes metal rust faster., Only metals that contain iron can rust., Salt can speed up rusting, especially in coastal areas.,

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