Oxygen is essential for rusting. But a portion of iron rod in contact with oxygen is not damaged rather the other end is damaged. Explain why?
Asked by Topperlearning User | 25th Jun, 2014, 08:39: AM
During the rusting of Iron, at anode the oxidation of iron takes place and it is not facilitated by the presence of oxygen it is essentially favored by the presence of water. The ferrous ion released by the oxidation of iron reacts with hydroxide ions at cathode; this reaction is favoured by the presence of oxygen. In the presence of oxygen, cathode reaction is faster where iron is not affected.
Answered by | 25th Jun, 2014, 10:39: AM
- What is Corrosion? Do we observe corrosion only in Iron?
- What are the essential requirements for corrosion to take place?
- Account for the following: "Alkaline medium inhibits the rusting of iron".
- Give three easier ways of preventing rusting of Iron.
- Why carbon dioxide dissolved in water increases the rate of rusting?
- Rusting of iron becomes quicker in saline medium. Explain.
- Iron does not rust even if the zinc metal coating on its surface is broken but the same is not true when coating is of Tin.
- What is meant by Cathodic protection of the Iron? Explain it taking the example of Magnesium attached to an Iron tank or pipe.
- How des galvanization of Iron Prevents its rusting?
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