Abstract
A novel environmentally friendly type of calcium carbonate and iron(III) scale inhibitor AQn was synthesized. The anti-scale property of the AQn copolymer toward CaCO3 and iron(III) in the artificial cooling water was studied through static scale inhibition tests. The observation shows that both calcium carbonate and iron(III) inhibition increase with increasing the degree of polymerization of AQn from 5 to 15, and the dosage of AQn plays an important role on calcium carbonate and iron(III) inhibition. The effect on formation of CaCO3 was investigated with combination of scanning electronic microscopy, transmission electron microscopy, X-ray powder diffraction analysis, and Fourier-transform infrared spectrometer, respectively. Inhibition mechanism is proposed that the interactions between calcium or iron ions and polyethylene glycol are the fundamental impetus to restrain the formation of the scale in cooling water systems.
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