Anodized aluminum is ...

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(D) Anodizing is an electrochemical process that converts the metal surface into a decorative,durable,corrosion-resistant,anodic oxide finish.In the c

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An electrolytically deposited layer of aluminum oxide on $Al$

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(D) Anodizing is an electrochemical process that converts the metal surface into a decorative,durable,corrosion-resistant,anodic oxide finish.In the case of aluminum,the metal is made the anode in an electrolytic cell containing an electrolyte (usually sulfuric acid).When current is passed,oxygen is evolved at the anode,which reacts with the aluminum surface to form a thick,protective layer of aluminum oxide $(Al_2O_3)$.

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