AWWA ACE61803

There is surprisingly little work that directly examines the role of disinfectant type on aspects of iron corrosion. This study directly compared iron weight loss and iron release in a synthesized water with no disinfectant, chlorine and chloramine. Free chlorine had clear advantages relative to monochloramine. Additional testing revealed that the presence of organic matter was deleterious to iron corrosion and hardness ions (Ca⁺² and Mg⁺²) reduced the ability of silica to cause red water. Additional study is underway to explicitly investigate the role of sulfate reducing bacteria (SRB) in iron corrosion, and the role of disinfection in preventing or exacerbating SRB attack. Includes 34 references, tables, figures.