Objectives : Determination of reaction order (n) and rate constants (k) of the CaCO₃ scale formation reaction that was accelerated by the HVI (high voltage impulse) induction.Methods : HVI was inducted to the synthetic solution containing 2.5 mM of Ca²⁺ ion at different temperatures of 25, 40, 60℃. The concentration of Ca²⁺ ion has been monitored as voltages of the HVI increased from 0 to 5, 10, 15 kV. Reaction order and the rate constants of the

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... formation reaction were determined with the experimental dataset of Ca²⁺ concentration vs. time plots.Results and Discussion : The CaCO₃ formation was determined to follow two-molecules 2^nd order reaction. The reaction rate constant, k increased as temperature and the applied voltages of HVI increased. The rate constant, k at 25℃ and 15 kV of HVI was 8.2×10^-3 L/(mmol・hr), which was 2.7 times greater than the k of the control at 25℃, 3.0×10^-3 L/(mmol・hr).Conclusions : The reaction of CaCO₃ formation was accelerated by HVI as the applied voltages of HVI increased, indicating that the HVI could be used as an alternative desalting technology for scale control.