Transportation Science

How does rust occur?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. Rust is the result of the electrochemical process of corrosion. This occurs when a piece of metal reacts with a liquid and iron oxide, or rust, is produced. To create rust, you need an anode, a metal that releases electrons; electrolytes, liquids that move electrons; and cathodes, metals that accept electrons. The metal in your car can serve as both anode and cathode. As electrons flow via the electrolytes, the metal corrodes and weakens.

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