copper leaching in solar thermal system [RE-wrenches]

matthew tritt solarone at charter.net
Sat Oct 19 12:03:58 PDT 2002


Todd again,

Di-electric incompatibility is what's happening. Electrolysis happens when
dis-similar metals come in contact in or with a conductive media (hard
water?) and one of them loses! But you probably know this. Have you water
checked for high TDS. I bet that's the culprit

Matt
----- Original Message -----
From: "Todd Cory, Mt. Shasta Energy Services" <toddcory at finestplanet.com>
To: <RE-wrenches at topica.com>
Sent: Friday, October 18, 2002 10:35 PM
Subject: copper leaching in solar thermal system [RE-wrenches]


> I have a personal concern about my home's solar thermal system. Ever since
I
> put it in 5 years ago the hot water appears to be carrying large amounts
of
> copper as is evident by the shower walls and floor (and my wife's blond
> hair) turning a light shade of green. I am totally baffled by why this is
> happening.
>
> The system is a simple 2 flat plate, 2 pump, glycol system, all copper
with
> SS flat plate heat exchanger. I maintain the water heater's anode and just
> replaced the old one with a new magnesium one... so what would be causing
> the copper to be leaching from the pipes into the hot water?
>
> I rarely do solar thermal systems for others, but when I do I want to make
> sure they are configured so they will last. I worry that copper leaching
> will eventually leave the pipes thin and prone to leaking. Anyone have
> experience with this situation or have a clue on what might be happening?
>
> Todd
>
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