During cathodic protection, a more reactive metal such as zinc becomes the cathode and iron becomes the anode.

Name: During cathodic protection, a more reactive metal such as zinc becomes the cathode and iron becomes the anode.
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During cathodic protection, a more reactive metal such as zinc becomes the anode and sacrifices itself to protect the less reactive metal (iron), which becomes the cathode.

During Cathodic Protection, a More Reactive Metal Such as Zinc