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What are the types of scale inhibitors?

2016-11-08 02:19:00

        Commonly used in water treatment inhibitors are polyphosphate, organic phosphonic acid, phosphonic acid, organic phosphonate, polycarboxylic acid and so on.

Polyphosphate
        Commonly used polyphosphoric acid sodium tripolyphosphate and sodium hexametaphosphate, in the water generated long-chain anions easily adsorbed on the tiny calcium carbonate grains, with this anion easy and CO32-replacement, thereby preventing the precipitation of calcium carbonate.
        Organic phosphonic acid scale inhibitor
        Commonly used ATMP, HEDP, EDTMPS, DTPMPA, PBTCA, BHMT and so on. The inhibition of calcium carbonate, hydrated iron oxide or calcium sulfate precipitation or precipitation have a good effect.
        Organic phosphonate
        Organic phosphonates inhibit calcium sulfate scale better, but the effect of inhibiting calcium carbonate scale is poor. Its low toxicity, easy hydrolysis.
        Polycarboxylic acid type scale inhibitor dispersant
        Polycarboxylic acid compounds have good scale inhibition effect on calcium carbonate scale, and the amount is very small. Commonly used are polyacrylic acid PAA, hydrolyzed maleic anhydride HPMA, AA / AMPS, multi-copolymer and so on.
        Mainly used for various sectors of the water cooler, oil cooler, condenser, air cooler, evaporator, radiator, reactor, absorption tower, storage tanks, pipelines and other equipment corrosion and scale.

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