CBEHub

← 2.3 Ferrous and Non- ferrous metals

Why ferrous metals rust

Metal Technology · Grade 10 · about 40 minutes

Rust is iron combining with oxygen and water. That is why ferrous work is painted, oiled or zinc-coated.

Sign in to read this lesson

Lessons are for learners and teachers with an account. Browsing the curriculum — subjects, strands and what each sub-strand covers — stays open to everyone.

  • 7 sections of explanation, worked examples and diagrams
  • 1 practice task with hints and worked answers
  • A quiz that marks itself as you go
  • Your progress kept across every subject you take
Sign in Create an account

Other lessons in this sub-strand

  1. Ferrous and non-ferrous metals
  2. Sorting metals with a magnet
  3. Why ferrous metals rust
  4. Mild steel
  5. Medium-carbon steel
  6. High-carbon steel
  7. Cast iron
  8. Aluminium
  9. Copper
  10. Tin, lead and zinc
  11. Physical properties of metals
  12. Mechanical properties of metals
  13. Hardness and toughness
  14. Malleability and ductility
  15. Iron ore
  16. The blast furnace
  17. From pig iron to steel
  18. Sheet, bar, rod and tube
  19. Angle, channel and I-section
  20. Matching metal to the job