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Mike Rivers wrote:

In article writes:

That's how a battery works, and it consumes one of the metals.

If one of those metals is the 'anode rod' then that's a good thing. It
prevents the pipe or the tank from being consumed. That's what anode
plates on the bottom of a boat hull do - keep the electrolytic action
away from metal that, when enough was removed, would would make the
boat leak.

Yoobetchya, but he was going to power a house with it.