Corrosion
In this experiment, we are investigating rusting and preventing rusting.
Aim: To investigate the factors that cause rusting and techniques that may prevent rusting in iron
Hypothesis:
- A = A bit of rust
- B = Rust, but more than A
- C = Lots of rust
- D = The nail won't rust because the oil has protected the nail
- E = The nail won't rust because the nail is protected by the bung
- F = The vaseline is going to protect the nail from rusting by giving it a coating
- G = Like the vaseline, the nail polish has coated the nail, so it's not going to rust
- H = The zinc might protect the nail, but I'm not sure
Equipment:
- 8 Test Tubes
- Large beaker
- 8 iron nails
- Tap water
- Salt
- Boiled water
- Oil
- Calcium Chloride (CaCl)
- Bung
- Vaseline gel
- Nail polish
- Zinc pallets (Zn)
Method:
- Label the eight test tubes, from A - H and place them into the beaker.
- Put an iron nail in each beaker.
- Test tube contents:
- A = Nail
- B = Nail + Water
- C = Nail + Salt water
- D = Nail + Boiled water + oil
- E = Nail + CaCl + bung
- F = Nail + Vaseline + water
- G = Nail + Paint/Nail polish + water
- H = Nail + Zn + water
- Fill the water in the test tube at the same amount (less than half)
- Leave the test tubes undisturbed for at least three days.
- A = Nail
- Control - normal condition - comparing to other test tubes
- C = Nail + Salt water
- It rusts the iron nail quicker.
- E = Nail + CaCl + bung
- Drys the air which is trapped in the test tube
