Science - Corrosion

 Aim - To investigate the factors that cause rusting in iron. 

Equipment - Four test tubes, test tube rack, a bung, four iron nails, boiled water, tap water, salty water, cooking oil, calcium and chloride. 

Method - 

1: Label four test tubes A-D and place in a test tube rack.

2: Test tube contents: 

A= Iron nail and tap water.

B=Iron nail and salty water.

C=Iron nail, boiled water, oil. 

D=Iron nail and calcium chloride. sealed with a bung.

3 - Leave the test tubes undisturbed for at least three days. 

Aim - To investigate a number of techniques that may prevent rusting.

Equipment - Four test tubes, test tube rack, a bung, four iron nails, tap water, Vaseline gel, nail polish or paint, zinc pellets or magnesium ribbon. 

Method - 

1: Label four test tubes A-D and place in a test tube rack. 

2: Fill all test tubes with equal volumes of water - enough to cover nails. 

3: Test tube contents:

A=Iron nail

B= Iron nail cover in Vaseline

C=Iron nail painted with nail polish or paint.

D= Iron nail with a small piece of magnesium ribbon wrapped around it, or with zinc pellets added to the test tubes.