Question

what is silica polyphosphate used for in water treatment?

Answer 1

Polyphosphates are a group of chemical compounds which react with small quantities of hardness to form a thin, tight film on pipe walls. This film is almost like glass coating. These films or coatings keep water away from the metals and in this way control corrosion. Polyphosphates are effective in controlling corrosion of most metals used in household plumbing. Copper and its alloys are the one exception at present. This action is being given further study.

Polyphosphate films are not permanent. They will dissolve over a period of time. To combat this it is necessary to feed polyphosphates into the water more or less continuously. For best results, use 5 to 10 ppm of polyphosphates in cold water; 5 to 20 ppm in hot water. This dosage will generally give adequate protection against corrosion.
reference- http://www.freedrinkingwater.com/water_quality/chemical/controlling-corrosion-problems-methods.htm

Answer 2

hope this helps:D
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Answer 3

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