This powerpoint presentation begins by providing a brief overview of internal metallic pipe
corrosion encountered in water
distribution systems, factors impacting corrosion, and water treatment plants (WTPs) of the City of Marco Island. Study objectives and approach included the following: investigate the causes of copper pitting; review water quality and process chemistry
to determine if correlations exist between
water quality, plant operations, and process
control changes;
conduct interviews with consumers based on
complaint records; and, provide recommendations on necessary
actions required to control copper pitting. Research findings indicate the following:
the majority of the pitting problems occur in
horizontal cold water copper piping;
many of the cases reported in the City's plumbing
system are due to the Type M copper;
there is sufficient evidence that Type L
copper is much more durable and compatible with
the City's water quality;
no conclusive evidence was found that
electrical grounding is an issue in the copper
pitting corrosion in the City's residential piping; a potential cause of pitting is a biological
attack on the copper piping caused by the
growth of nitrifying bacteria in the distribution
system; and,
the low alkaline water in the distribution
system tends to be slightly under-saturated
for calcium carbonate based on the Langelier
Saturation Index. Includes table, figure.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 910 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 17 |
| Published : | 11/01/2008 |
