AWWA WQTC71627

This study presents the results of a visual and mineralogical characterization of scales developed over long time periods (up to 115 years) at galvanically-connected lead-brass and lead-copper joints from several different drinking water distribution systems. The long-term exposure aspect of these samples allows a direct view as to which metal in the galvanic couple actually behaved anodically (i.e., corroded) over time, and an evaluation of mineral phases produced at these sites. Although beyond the scope of the current study, the latter observations, coupled with knowledge of the bulk water chemistry, may be used to model the conditions under which the deposits formed. Includes 7 references, tables, figures.