Rusting

• How can you prevent rust?

  • Paint
  • Oil or grease
  • Plastic
  • Less reactive metal
  • More reactive metal
• Rust word equation:

  Iron + oxygen + water -> hydrated iron oxide
• What is sacrificial protection?

  When a more reactive metal (like zinc or magnesium) is attached to iron or steel, so it corrodes instead of the iron, preventing rusting.
• Galvanised: A metal, usually iron or steel, has been coated with a layer of zinc to protect it from rusting.
• Rusting requires:

  • Oxygen
  • Salt Solution
  • Water