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Potassium Tripolyphosphate

Last updated: July 19, 2024

What Does Potassium Tripolyphosphate Mean?

Potassium tripolyphosphate (KTPP) is a chemical substance with the molecular formula K5O10P3. It is hygroscopic in nature and used to form protective films on metal surfaces to enhance corrosion resistance.


Corrosionpedia Explains Potassium Tripolyphosphate

Some important physical properties of potassium tripolyphosphate related to corrosion prevention are:

  • Water resistance that prevents corrosion-causing moisture penetration
  • Occurs in a powdered form that increases the ease of dispersion and application
  • Soluble in water, giving it and increased alkalinity and pH

50% potassium tripolyphosphate (KTPP) is mainly used in the following industrial applications:

  • Metal surface treatment
  • Water soluble fertilizer production
  • Softening of hard water

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