Citation:

LYTLE, D. A. AND M. R. SCHOCK. UNSOLVED PROBLEMS WITH CORROSION AND DISTRIBUTION SYSTEM INORGANICS. Presented at AWWA ANNUAL CONFERENCE, TORONTO, QC, CANADA, June 25 - 28, 2007.

Description:

This presentation provides an overview of new research results and remaining research needs with respect to both corrosion control issues (lead, copper, iron) and to issues of inorganic contaminants that can form or accumulate in distribution system water, pipe scales and distribution system sediments. The topics to be covered include: occurrence of elevated copper release in systems that meet the Action Level; occurrence and significance of PbO₂ in lead service lines with respect to disinfection and monitoring; interaction of iron and manganese deposits with oxidants, corrosion inhibitors and trace contaminants; occurrence and buildup of vanadium in pipe scales in relation to CCL; discrepancies in solubility predictions and lead mineralogy at high pH; unusual mineralogy of lead and copper phosphates providing corrosion inhibition; factors affecting pinhole lead generation in new copper piping; and residual elevated levels of inorganics such as As after removal treatment is installed.

Record Details: