Prevention of Corrosion
Chemistry ⇒ Metals and Non-metals
Prevention of Corrosion starts at 8 and continues till grade 12.
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See sample questions for grade 12
A ship's hull is protected from corrosion by attaching blocks of zinc to it. Explain the role of zinc in this context.
Describe the difference between anodic and cathodic protection.
Describe the principle behind cathodic protection.
Describe the role of inhibitors in the prevention of corrosion.
Explain how painting a metal surface helps in preventing corrosion.
Explain why aluminum does not corrode easily even though it is a reactive metal.
Explain why copper does not corrode as quickly as iron in moist air.
Explain why iron nails rust faster in saline water than in distilled water.
Explain why iron objects should be kept dry to prevent corrosion.
Explain why iron rusts more quickly in coastal areas than in dry inland areas.
Explain why magnesium is used as a sacrificial anode in water heaters.
Name the process in which a more reactive metal is used to protect a less reactive metal from corrosion.
State one advantage and one disadvantage of using paint as a method to prevent corrosion.
State two disadvantages of using sacrificial anodes for corrosion prevention.
