Question

How to prevent rusting? [3 MARKS]

Answer 1

Each point: 1 Mark

The rusting of iron can be prevented by the following methods :

1. Iron is protected from rusting by coating it with a thin layer of another metal which is more reactive that iron. Zinc is commonly used for covering iron surfaces. The process of covering iron with zinc is called galvanization.

2. The iron pipes which are in contact with water such as ground water pipes are protected from rusting by connecting these with more reactive metals like Mg or Zn.

3. To decrease rusting of iron, certain anti-rust solutions are used.