Corrosion

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

Method:

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

2. Test tube contents.

A = Iron nail and tap water

B = iron nail and oil

C = Iron nail and Nail Polish

D = Iron nail and salty water

E = Iron nail and calcium chloride sealed with a bung

F = Iron nail warped in aluminium.

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

Results: 

Discussion: 

An iron nail will corrode if it comes into contact with the environment and it would corrode quicker if it is in contact of water or salt this is why water and salt have the most rust. This can be stopped by blocking oxygen to the iron nail paint, grease or plastic will do to achieve this or you can coat it in other reactive metals such as zinc which are called galvanised.

Conclusion:

To make something rust it must be in the environment to do so that is why water has created the most rust while calcium chloride became the slowest and less reactive rust.