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Air and Atmosphere — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAir and Atmosphere2 Marks
Question
State four ways of preventing rusting.
✓

Answer

Rusting Can be prevented by :
  1. Galvanising– iron metal is coated with zinc.
  2. Enamelling– iron surface is baked with mixutre of silicates at high temperature.
  3. Coating with red lead oxide paint or tar on iron surface.
  4. Oils and grease coating on iron surface cuts off moist air and prevents rusting.

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