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The millennium spire, in Dublin, is made from steel - Junior Cycle Science - Question c - 2006
Question c
The millennium spire, in Dublin, is made from steel. Iron and steel can suffer from corrosion. Iron and steel show visible signs of corrosion. Give one visible sig... show full transcript
Worked Solution & Example Answer:The millennium spire, in Dublin, is made from steel - Junior Cycle Science - Question c - 2006
Step 1
Step 2
(i) oxygen alone, will not lead to the corrosion of iron (or steel).
Answer
To demonstrate that oxygen alone does not cause corrosion, set up a test tube containing iron nails and a dry environment, such as using calcium chloride as a drying agent at the bottom of the tube. Ensure that there is no moisture present. After a period of time, observe that the iron nails remain unaffected, indicating that without moisture, the oxygen does not lead to corrosion.
Step 3
(ii) water alone will not lead to the corrosion of iron (or steel).
Answer
In this experiment, place iron nails in a test tube filled with boiled (de-gassed) water to remove dissolved gases. Seal the test tube to prevent exposure to air. After some time, examine the nails and note that they show no signs of corrosion, as the absence of oxygen prevents the corrosion process.