What should a good internal water treatment program accomplish?

The purposes of an internal treatment program include:

  • to react with incoming feedwater hardness and prevent it from precipitating on the boiler metal as scale
  • to condition any suspended matter such as hardness sludge in the boiler and make it nonadherent to the boiler metal
  • to control the causes of boiler water carryover
  • to eliminate oxygen from the feedwater
  • to provide enough alkalinity to prevent boiler corrosion

In addition, a complete treatment program should prevent corrosion and scaling of the feedwater system and protect against corrosion in the steam-condensate systems.