Why is ac not used to cathodically protect a structure?

or:Why is ac not used to cathodically protect a structure?or:AC is alternating current. If you connect it to the existing cathode of the structure yo

or:Why is ac not used to cathodically protect a structure?

or:AC is alternating current. If you connect it to the existing cathode of the structure you would have to use a diode to block the positive half of the AC voltage and pass the negative half of the voltage to the cathode. You would also have to use a circuit or a transformer to lower the voltage to a safe level. Failure to do this could result in the electrocution of someone

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