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Corrosion Control and Metals Release

Confluence has been involved in a wide array of corrosion control and metals release-related projects ranging from prevention and mitigation of discolored water events to process selection for achieving optimal corrosion control under the USEPA Lead and Copper Rule.

We have developed detailed protocols to understand corrosion and metals release risks associated with introduction of new sources, blending of different sources, changes in finished water quality associated with modified treatment practices, and changes in secondary disinfectant residuals. Microbial, chemical, and physical factors are considered when diagnosing water quality issues and recommending optimal corrosion control parameters.

Members of the Confluence team have worked with dozens of utilities across North America to identify and select optimal corrosion control treatment while maintaining simultaneous compliance with other Safe Drinking Water Act requirements.

Specific areas of expertise include:

  • Desk-top studies to determine optimal corrosion control treatment techniques
  • Simultaneous compliance and impacts of corrosion control treatment on disinfection byproduct formation, disinfectant efficacy, etc.
  • pH and alkalinity adjustment technologies such as assessment of aeration, caustic soda, soda ash, lime, and use of calcite contactors
  • Use of corrosion inhibitors
  • Impacts of blending groundwater and surface water sources on corrosion control
  • Bench-scale and pilot testing of treatment alternatives
Portland Corrosion Pilot

Portland Corrosion Pilot

EPA Pilot used in Flint, MI

EPA Pilot Used In Flint, MI