Explain how areas of anode and cathode effect the rate of corrosion.

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Effect of Cathodic & Anodic area:

If catholic area is small & anodic area is large & requirement of electron is very less which can be easily satisfied by large anode & corrosion is not very serious.
On the contrary if anodic area is small & cathodic area is large so requirement of electron is larger which can not satisfied by small anode then corrosion is very serious which is beyond control

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