AWWA WQTC69287

The objective of this work was to compare the properties of lead solids formed during bench-scale precipitation experiments to solids found on lead pipe removed from real drinking water distribution systems and metal coupons used in pilot scale corrosion testing. Specifically, solids and surface analysis approaches, including XRD, SEM, TEM, and EDS were used to compare the properties of lead solids and corrosion byproducts. These results provide insight into the understanding of how corrosion byproduct scales form on lead pipes, and into the dissolution of lead in drinking water distribution systems. Findings suggest that low to moderate alkalinity decreases corrosion rates, while higher alkalinities have a tendency to increase the corrosion rates of lead. Includes 9 references, table, figures.