Science: Corrosion Experiment pt. 1 & pt. 2

CORROSION EXPERIMENT PT. 1

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

Equipment:

• 8 test tubes
• test tubes rack
• a bung
• 8 iron nails
• boiled water 
• tap water
• salty water
• cooking oil
• calcium and chloride 
• nail polish 
• vaseline 
• zinc 

Method:

1.) Label all 8 test tubes A - H

2.) Test tube contents:

A = Nail

B = Tap water + nail

C = Salty water + nail

D = Boiled water, oil + nail

E = CaCl, bung + nail 

F = Water, vaseline + nail

G = Water + painted nail 

H = Zn, water + nail

3.) Leave the test tubes for at least 3 days. 

Hypothesis:  A-C will rust especially C. While D-G is not gonna rust.

Picture of BEFORE:

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CORROSION EXPERIMENT PT. 2

Preventing Rusting:

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

Equipment:

• Four test tubes
• Test tube rack
• Bung
• Four iron nails
• Boiled water
• Tap water
• Vaseline gel
• Nail
• Polish or paint
• Zinc pellets or magnesium ribbon

Methods:

1. Label four test tubes and place them in a test tube rack.
2. Fill all test tubes with equal volumes of water - enough to cover the nails.
3. Test tube contents:

• A = Iron nail
• F = Iron nail, water and vaseline
• G = Iron nail and nail polish
• H = Iron nail, zinc and water

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

RESULTS:

A = The iron nail rusted.

B = This tube showed the worst reaction as it corroded out of all of them and you could see the orange rust floating in the water.

C = It rusted a bit but it wasn't visible as much. 

D = It was a slightly similar reaction to test tube B but the difference the colour orange wasn't as bold. 

E = This one didn't rust because there was a bung preventing the air coming to the nail which prevents one of the ingredient for it to rust. 

F = Despite the vaseline coating around it, it still rusted and it was visible in the water.

G = It rusted as the paint slowly vanished.

H = Test tube H only rusted a little bit as zinc pellet affected the rusting of it.