Of the following metals, which metal would be suitable to provide an iron bridge with cathodic protection from corrosion?

Name: Of the following metals, which metal would be suitable to provide an iron bridge with cathodic protection from corrosion?
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Question

Quizplus · Accepted Answer

Cathodic protection requires a more reactive (anodic) metal than iron to act as the sacrificial anode. None of the metals listed (Ni, Cu, Pb, Sn) are more reactive than iron; therefore, they would not provide cathodic protection to an iron bridge.

Of the Following Metals, Which Metal Would Be Suitable to Provide