Product Dose

Performance Advantages with  Scale Inhibitor 4300 RX Polymer Scale Inhibitor

The following tables compare the product efficacy of  Scale Inhibitor 4300 Rx  polymer with other scale control agents for inhibiting calcium salts and dispersing solids. The higher the performance value (% inhibition or NTU), the better the scale inhibitor and dispersant. Test conditions represent various salt levels found in cycled cooling water.

Calcium Carbonate Inhibition :

Polymers were tested for preventing the precipitation of calcium carbonate under highly stressed conditions. The "High Salt" conditions used for these evaluations contain chloride levels typical of seawater or very briny waters. The "High Calcium" conditions contain calcium and carbonate levels typical of highly cycled cooling water. In Table 1,  Scale Inhibitor 4300 Rx  provided excellent performance for inhibiting calcium carbonate under both test conditions. Scale Inhibitor 4300 Rx , HEDP and polymaleic acid were the best inhibitors in the "High Salt" test while  Scale Inhibitor 4300 Rx and pAA were the best inhibitors in the "High Calcium" test. Note that a competitive polymer, V1, performed poorly in
the "High Salt" test for inhibiting calcium carbonate.

Table 1 - Scale Inhibitor 4300 Rx- Calcium Carbonate Scale Inhibitor

CaCO3 Inhibition (%) (High Salt): 20 ppm polymer solids/200 ppm Ca+2 as CaCO3/3500 ppm

M-Alkalinity as CaCO3/30,000 ppm NaCl/pH 9/38°C/20 hours.

CaCO3 Inhibition (%) (High Calcium): 10 ppm polymer solids/600 ppm Ca+2 as CaCO3/300 ppm Mg+2 as CaCO3/600 ppm

M-Alkalinity/pH 9/54°C/20 hours.

Calcium Sulfate Inhibition : 

Scale Inhibitor 4300 RX  is also an excellent calcium sulfate inhibitor as demonstrated in Table 2. Many conditions were evaluated at different temperatures, pH and polymer levels. Scale Inhibitor 4300 RX provided excellent performance similar to pAA in the longer term tests but was the best performer for inhibiting calcium sulfate in once-thru conditions where induction time is under an hour. Scale Inhibitor 4300 RX excelled over polymaleic acid and HEDP for inhibiting calcium sulfate.