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Mineralogy of Galvanic Corrosion By-products in Domestic Drinking Water Pipes
Citation:
DESANTIS, M. K. Mineralogy of Galvanic Corrosion By-products in Domestic Drinking Water Pipes. Presented at Cincinnati Area Water Distribution Systems Networking Seminar, Cincinnati, OH, January 26, 2011.
Impact/Purpose:
To inform the public.
Description:
This study presents the results of a visual and mineralogical characterization of scales developed over long time periods at galvanically coupled lead-brass and lead-copper pipe 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, as well as an evaluation of mineral phases produced at these sites. The latter observations, coupled with knowledge of the bulk water chemistry, may be used to model the conditions under which the deposits formed.