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chemistry(rusting)

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Why metal(eg. iron)placed at aqueous solution will be more easily occur rusting?Is it due to the mobile ions in the aqueous solution ?Please give me an detail explanation ,thank you.

  • chemistry(rusting) - ,

    See "oxidation of iron metal" at
    http://en.wikipedia.org/wiki/Rust

    Rust results in the formation of iron hydroxide at the surface, under the combined action of water and oxygen. The iron oxide does not form a protective layer, but instead flakes off.

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