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COPPER CORROSION

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consruct1

Structural
Feb 1, 2003
3
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?
 
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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

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