At what upper pH level does a liquid begin to corrode standard
concrete sewer pipe?  The source of this information must be provided,
i.e., book or paper title and the author(s).

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Request for Question Clarification by hummer-ga on 19 Sep 2003 06:24 PDT

Hi royceh,

The key to corrosion in sewer pipes is not the pH of the liquid, but
rather the pH of the concrete.  Would research on the pH of the
concrete answer your question?

Thank you, 
hummer

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Request for Question Clarification by techtor-ga on 20 Sep 2003 00:05 PDT

My findings concord with Hummer's. I found an online study of concrete
pipe corrosion which mentions the ph of the concrete pipe rather than
the liquid flowing through. It also mentions microorganisms as the
more likely culprit of corrosion. It is likely to be what Hummer found
as well.