The more noble material, called the ________, is protected by sacrificial corrosion of the more active material, called the ________. The more active metal corrodes at a higher rate than it would if it were not connected to the more noble metal.

Question

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In galvanic corrosion, the more noble material is the cathode, and it is protected by the sacrificial corrosion of the more active material, which is the anode. The anode corrodes preferentially, protecting the cathode.

The More Noble Material, Called the ________, Is Protected by Sacrificial