Comparison and description about the rate of corrosion

Perform a first-hand investigation to compare and describe the rate of corrosion of materials in different:
  • oxygen concentrations
  • temperatures
  • salt concentrations

  • Obtain several identical samples of a certain material, such as iron.
  • Place each sample in its own corked test tube, with the test tubes having conditions varying in the following areas:
    • Oxygen concentration.
    • Temperature.
    • Salt concentration.
  • Observe the tubes over a week and record observations.
  • It should be observed that:
    • Increased oxygen concentration leads to increased rate of corrosion.
    • Increased temperature leads to increased rate of corrosion.
    • An increased salt concentration leads to increased rate of corrosion.