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COPPER CORROSION

COPPER CORROSION

COPPER CORROSION

(OP)
IN THE PROCESS OF REMODELING A HOME,ALL NEW PLUMBING.
THE PIPING WILL BE PEX AND THE FITTINGS ARE COPPER,
A WATER TREATMENT COMPANY HAS SAID THAT THE WATER WAS TO ACIDIC AND THAT I NEED A $3,500
TREATMENT SYSTEM TO CORRECT OR THE PIPES(FITTINGS)
WOULD FAIL. MY QUESTION IS AT WHAT POINT(PH)WILL
COPPER START TO DETERIORATE?

RE: COPPER CORROSION

While the corrosion of copper will also vary with the water's hardness, oxygen content, CO2 content, Fe, sulfide, etc., a pH of 7.4 is the minimum I would tolerate. A pH of 7.8 is what public utilities often use.
To see how the solubility of Cu varies with pH, see
http://www.finishing.com/Library/metalpH.html

What treatment method are you considering?
My corrosion handbook mentions treatment with lime or sodium silicate.

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