Along with graph representation:
Monday, 9 September 2013
Three - Completion
Samples of the nails, in the orders - Group C, Group D, Group A (with electrolysis), Group B (with electrolysis).
Two - Progression and Adaption
16.08.13 - Day 0
19.08.13 - Day 3
Group C:
Group D
Observations: Almost no difference seen visibly. However close inspection shows just the tiniest of rust formations (approx. 2% total coverage).
22.08.13 - Day 6
Day 6 witnesses the end of observations for Group C and D, along with its dismantling. Preparations complete for Group A and B, observations start.
Group C:
Group C:
Note: Pictures were taken after dismantling
Observations: Even more rust progression when compared to Day 3. Day 6 shows roughly 90% rust coverage on Group C's nails.
Group D: Noticeable rust coverage on nails with distilled water, approx 5% rust progression. Almost no difference when weighed on scales.
Groups with electrolysis - after attempts to ensure the circuit was secure (light bulb on), observations commenced.
Group A:
Group A:
Observations: Sticky tape used to ensure complete circuit (proved difficult). Group A done perfectly in accordance to concepts. Currently 0% rust progression.
Group B:
Group B:
Note: Second group of alligator clips from Group A above connect to this, to lessen the amount of power supplies used. So if the top circuit is broken Group B will not work either.
Observations: Minor rusting evident in Group B, almost the same results as Group D without electrolysis.
Adaptations: Frequent breaks in circuit lead to using hairclips/pegs to put a tighter grip on the metal coiled around the nails.
26.08.13 - Day 10
Day 10 witnessed the end of observations for Groups A and B, and addition to its dismantling.
Group A:
Group A:
Note: Pictures were taken after dismantling
Observations: A significant amount of rust progression (25% rust coverage) for nails sprayed by saline solution. Electrolysis appears to have done little to prevent it, however it may also be due to the periods when the circuit broke that the corrosion may have occurred. Rust minimisation is evident.
Observations: A significant amount of rust progression (25% rust coverage) for nails sprayed by saline solution. Electrolysis appears to have done little to prevent it, however it may also be due to the periods when the circuit broke that the corrosion may have occurred. Rust minimisation is evident.
Group B:
Observations: Less rust progression (5% when compared to distilled water on nails without any corrosion prevention measures (Group D), which is an anomaly.
One - Conception
The investigation designed to investigate the corrosive ability of a saline solution contrasted with distilled water - and the extent in which 'electrolysis' can prevent such rusting.
So:
1. Distilled water and salt to be sprayed on nails (replicating humidity or the frequent spraying experienced near coastal areas) to promote corrosion.
2. Nails will predominantly be composed of iron (Fe) among other trace metals. Note: Investigation will focus on the rusting of iron, and will not take into factor other materials used to compose the iron-alloy.
3. Initial predictions: Saline solution is expected to make the nails rust a lot more than distilled water. Intervention of electrolysis will slightly prevent corrosion.
4. Concepts:
Concept for nails without electrolysis.
Equipment and Procedure:
Initial requirements:
Concept of Groups with electrolysis, or corrosion prevention measures.
Highlighted* Any breaks in the conductive wire (circuit) will cause the light to go off - a good indicator of whether electrolysis is taking place.
So:
1. Distilled water and salt to be sprayed on nails (replicating humidity or the frequent spraying experienced near coastal areas) to promote corrosion.
2. Nails will predominantly be composed of iron (Fe) among other trace metals. Note: Investigation will focus on the rusting of iron, and will not take into factor other materials used to compose the iron-alloy.
3. Initial predictions: Saline solution is expected to make the nails rust a lot more than distilled water. Intervention of electrolysis will slightly prevent corrosion.
4. Concepts:
Concept for nails without electrolysis.
*It was established that the terms for the 'blocks of wood' be referred to as 'Groups'. Groups without corrosion prevention measures marked 'distilled water' and 'saline solution' will be named C and D respectively
Equipment and Procedure:
Initial requirements:
- 10 iron nails - approx 0.5cm wide, 6cm long
- Scales
- Distilled water + saline solution
- Block of wood
Hammer - Bottle spray
- 500mL container
1. Set up scaling apparatus.
2. Gather nails.
3. Nails are to be hammered into blocks of wood, 10 nails evenly spaced in each wood.
4. Use 500mL beaker of distilled water and salt solution (they are separate)
5. Fill bottle spray.
6. Spray nails.
7. Remove nails and measure corrosion formation (if any).
2. Gather nails.
3. Nails are to be hammered into blocks of wood, 10 nails evenly spaced in each wood.
4. Use 500mL beaker of distilled water and salt solution (they are separate)
5. Fill bottle spray.
6. Spray nails.
7. Remove nails and measure corrosion formation (if any).
Concept of Groups with electrolysis, or corrosion prevention measures.
Highlighted* Any breaks in the conductive wire (circuit) will cause the light to go off - a good indicator of whether electrolysis is taking place.
Equipment and procedure:
- 10 nails
- Scales
- Distilled water/saline solution
- Block of wood
- Hammer
- Bottle spray
- Low voltage power supply
Conductive wire (must be aluminium) - Light bulb
- Alligator clips
1. Set up scaling apparatus.
2. Gather nails.
3. Nails are to be hammered into blocks of wood, 10 nails evenly spaced in each wood.
4. Take conductive wire, strip sides approximately 1-2cm inwards from the end so wiring is exposed. Attach wire to nails in a top-to-top bottom-to-bottom fashion, leaving the middle two nails.
5. Attach low voltage power supply to power outlet, use alligator clips to connect light bulb to power supply.
6. Attach the two to centre two nails to complete circuit.
7. Prepare spray bottle (distilled and salt).
8. Turn power off, spray nails. Ensure all surface area of nails have been covered, record weight of bottle (with lid off) after procedure.
9. Turn power on, refer to light bulb to ensure circuit is running.
10. Remove nails and measure corrosion formation (if any).
2. Gather nails.
3. Nails are to be hammered into blocks of wood, 10 nails evenly spaced in each wood.
4. Take conductive wire, strip sides approximately 1-2cm inwards from the end so wiring is exposed. Attach wire to nails in a top-to-top bottom-to-bottom fashion, leaving the middle two nails.
5. Attach low voltage power supply to power outlet, use alligator clips to connect light bulb to power supply.
6. Attach the two to centre two nails to complete circuit.
7. Prepare spray bottle (distilled and salt).
8. Turn power off, spray nails. Ensure all surface area of nails have been covered, record weight of bottle (with lid off) after procedure.
9. Turn power on, refer to light bulb to ensure circuit is running.
10. Remove nails and measure corrosion formation (if any).
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