Mixing metals in water pipes
"dpb" wrote in message ...
Jeff Wisnia wrote:
...
I'm afraid you are wrong there, dpb. the electrical connection between the
two dissimilar metals does NOT have to be in the (wet) electrolyte area.
I _said_ there's still a potential. But it's still visible for inspection and
it's still the lesser of the evils -- the electrical ground has to be made.
They attach a zinc block to metal parts underwater on boats - sometimes even
with a wire going to an above water connection point. This reduces corrosion of
all the metal connected to it. The corrosion does not just occur at the
connection point. Connect a metal from the other end of the chart the same way -
everything would corrode faster, right?
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