Part A: (a) aluminum
Part B: Anodizing is an electrochemical process that is used to create a protective oxide layer on the surface of a metal. This layer helps to increase the corrosion resistance of the metal and provide a better finish. It can also be used as a way to color the metal, as the oxide layer can be dyed. Anodizing is most commonly associated with aluminum, as it is the most frequent metal used in this process. During anodizing, the metal is placed in an electrolyte bath and a current is passed through the bath. This causes the metal to become oxidized, creating the protective oxide layer.
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