Chemistry and Prevention of rusting
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Rusting is an example of a redox reaction. Iron and steel rust when they are in contact with oxygen and water. Rust prevention methods involve coating the metal object with oil, grease, paint, zinc or tin. The zinc acts as a ‘sacrificial metal’, in addition to stopping oxygen and air reaching the iron surface. A more reactive metal will displace a less reactive metal from solutions of its salts.
Level: Junior high
Topic: Prevention of rusting