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Probing The Role Of Silicates For Corrosion Control In Lead Plumbing, Hailey Holmes
Probing The Role Of Silicates For Corrosion Control In Lead Plumbing, Hailey Holmes
Electronic Thesis and Dissertation Repository
Lead service lines and fittings were installed in Canada's drinking water networks until 1986 and currently pose severe health risks. As pipes corrode over decades of use, lead is released into drinking water resulting in dangerous exposure to elevated lead levels. Sodium silicates can be used for corrosion control of lead, however a basic understanding of how they work is lacking. This thesis describes the results of experiments conducted to determine how silicates interact with lead and aluminum in drinking water, using microscopic and spectroscopic techniques. The results show the presence of silicates inhibited Pb2+ carbonates from oxidizing into …
Corrosion Scale Characteristics And Lead Oxide Dissolution In Chloraminated Water, Daoping Guo
Corrosion Scale Characteristics And Lead Oxide Dissolution In Chloraminated Water, Daoping Guo
Electronic Thesis and Dissertation Repository
The presence of lead in drinking water is a common issue for utilities where lead pipes are used as service lines in drinking water distribution systems. Dissolved lead concentrations have been linked to the destabilization of stratified lead corrosion scales formed at the inner walls of lead pipe used as drinking water service lines. To develop a framework for lead dissolution control, it is necessary to fully describe the characteristics of the surface layer of the lead corrosion scale in direct contact with drinking water. In the first part of this thesis, a thorough lead corrosion scale characterization is carried …