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Iron corrodes to form an iron oxide. This oxide is commonly called rust. The reaction involves a transfer of electrons from iron to oxygen. Water is commonly slightly acidic due to the carbon dioxide in the atmosphere. The acid brings hydrogen ions in contact with the iron which allows the formation of an iron hydroxide intermediary compound which hastens the formation of iron oxide, rust. Ships at the bottom of the ocean rust more slowly as there is less oxygen and the water is less acidic. The only way to prevent rust forming is to prevent oxygen coming in contact with the iron through the application of paint, oil, plastic or another metal.

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15y ago

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