Explain why aluminium resists corrosion but iron does not. Explain the term culling as used in livestock management. thr (a) (ii) State two methods of preventing iron from rusting [4 m: (6) (i) (ii) State three benefits of practising culling (5 m 172&1/pa/20
The corrosion resistance of aluminum is due to its tendency to form a compact oxide layer over the surface. The oxide formed offers a high resistance to corrosion. The normal surface film present in air is about 1 nm thick.
