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In two methods of control of corrosion o...

In two methods of control of corrosion of aluminium, either a layer of aluminium oxide is formed or a silver plating is done on the surface. State to which electrode the aluminium article is attached in these methods respectively

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i.In a process in which aluminium is coated with a layer of oxide, aluminium acts as an anode.
ii. In a process in which alwrumum is sliver plated, aluminium acts as a cathode.
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