Corrosion protection methods for the protection of the national infrastructure of copper/iron, copper, lead/iron potable water distribution systems and the national iron-based infrastructure

An integrated AC electrical supply and potable water distribution system comprising:

• potable water pipelines within a building structure and including at least one of copper pipelines, lead pipelines, iron pipelines, and combinations thereof, and wherein the potable water pipelines include portions thereof that are free of iron mainlines;
• potable water flowing through the potable water pipelines, the potable water including residual levels of one or more disinfecting chemical therein;
• an AC electrical supply connected to the building structure having the potable water pipelines, wherein said AC electrical supply includes a copper grounding electrode, and a portion of the AC electrical supply copper grounding electrode conductively connected to at least a portion of the potable water pipelines;
• and
• an additional grounding electrode of a different material than the copper grounding electrode connected to the copper grounding electrode of the AC electrical supply,
• a ground voltage of the AC electrical supply of −1.2 volts or below as referenced to a standard copper electrode;
• and
• wherein no external electrical current is generated between the grounding electrodes and the potable water pipelines and wherein the ground voltage of −1.2 volts or below protects inner surfaces of the potable water pipelines from corrosion by a redox-reaction of the one or more disinfecting chemicals.