The Lead and Copper Rule (LCR), which requires
data on total metals concentrations and tries to
establish the worst-case scenarios that can develop in
a distribution system, has influenced the drinking
water industry's perspective on corrosion issues even
when the problems do not fall under the rule's jurisdiction.
Utilities may use total metals concentrations
to make decisions about corrosion in their systems,
and as a result, select the wrong corrosion control
approach. In some cases, the typical corrosion control
strategies proposed in reference books and the
LCR, alkalinity and pH adjustment, calcium hardness
adjustment, and addition of a phosphate- or
silicate-based corrosion inhibitor, are irrelevant to
the problem at hand.
The LCR, with its emphasis on health effects data
collection, does not address the steps needed to assess
water system factors that can contribute to corrosion.
This article explains how differentiation of dissolved
and particulate metals can be used in corrosion investigations
to define the mechanisms involved in corrosion
and select appropriate remediation strategies. Includes 23 references, table, figures.
| Edition : | Vol. 98 - No. 1 |
| File Size : | 1
file
, 180 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 01/01/2006 |
