Localized or pitting corrosion of copper pipes used in
household plumbing is a problem for some homeowners.
Extreme attack can lead to pinhole leaks that may result
in water damage, mold growth, and costly repairs. The
objective of this research was to better define the specific
water quality conditions that support pitting corrosion.
Pilot-scale pipe rig testing found that pitting corrosion
occurred in waters with low chlorine concentrations
and dissolved inorganic carbon (DIC) concentrations
of 5 and 10 mg/L C (and possibly 25 mg/L C)
and pH 9 water in the presence of chloride.
Orthophosphate and increased DIC concentrations
prevented the initiation of localized corrosion. Water
suppliers considering changes in treatment and water
sources can use this information to avoid conditions
that support localized corrosion of copper. Includes 40 references, tables.
| Edition : | Vol. 100 - No. 3 |
| File Size : | 1
file
, 250 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 15 |
| Published : | 03/01/2008 |
