Investigation on the inhibition of CaCO3 precipitation by an environmental friendly terpolymer of AA/AMPS/TBAA in artificial seawater

The formation of mineral deposits such as calcium carbonate (CaCO3) causes many problems in cooling water systems 1,2. therefore in this study, the effect concentration of scale inhibition terpolymer of acrylic acid : 2-acrylamido-2-methylpropanesulfonic acid : t-butyl acrylamide (AA/AMPS/TBAA) on calcium carbonate precipitation in artificial seawater based on ASTM D1141 at cathodic potential of -0.9 VSCE on carbon steel electrode is investigated by electrochemical methods. Increase inhibitory concentration leads to increase in scaling time (ts) and residual normalized current density (irn). The Surface morphology characterization by using scanning electron microscopy and X-ray diffraction methods showed that presence of inhibitor to the amount of 2 ppm has not changed crystals morphology but cause decrease nucleation, delay in the crystal growth and increases dispersion on the electrode surface also reduced the percentage of coverage by CaCO3 precipitation 3.

کلیدواژه ها:

calcium carbonate ، Antiscalant ، acrylic acid: 2-acrylamido-2-methyl propanesulfonic acid: t-butyl acrylamide.