BBC Learning Zone Clips

CLIP 2300

Galvanising steel to prevent rusting

Galvanising steel to prevent rusting
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Key Info
  • Galvanising steel to prevent rusting
  • Duration: 00:58
  • Sophie Ryder is a sculptor who makes large metal animals from steel. Most of her work lives outside. To stop it from rusting it is galvanised - the sculptures are dipped in zinc. Zinc is a metal but at temperatures of 450 degrees Celsius it becomes a liquid. Zinc is used because it does not rust like iron or steel. In the zinc bath a chemical reaction makes the zinc stick to the metal forming a protective coating. If the galvanising is not damaged it should last up to a hundred years.
  • Subject:

    Science

       Topic:

    Changing Materials: Irreversible Change

  • Keywords: sculptor, metal, steel, rust, galvanised, zinc, liquid, chemical, reaction, protective coating, sculpture
Ideas for use in class
  • This clip would be useful when learning about changing materials. It clearly illustrates how to prevent the damaging effects of rust. Sculptures by Sophie Ryder seen in this clip might inspire art work.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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