An IA/SAS/SHP copolymer was synthesized by itaconic acid (IA), sodium allysulfonate (SAS) and sodium hypophosphite (SHP). This IA/SAS/SHP copolymer was characterized by Fourier transform infrared spectrometry (FT-IR) and nuclear magnetic resonance spectroscopy (NMR). The dynamic synergistic scale inhibition performance of the IA/SAS/SHP copolymer against CaCO3 in the presence of magnetic field and electrostatic field was studied using dynamic scale inhibition experiments. The results showed that there existed synergistic scale inhibition effect of IA/SAS/SHP copolymer against CaCO3 with magnetic field and electrostatic field. Comparing with single IA/SAS/SHP copolymer, the synergistic scale inhibition efficiency of IA/SAS/SHP copolymer against CaCO3 increased by 9.76% in the presence of magnetic field and 16.65% in the presence of electrostatic field. The scale inhibition efficiency of IA/SAS/SHP copolymer against CaCO3 in the presence of the magnetic field and electrostatic field as high as 100% was reached when IA/SAS/SHP copolymer concentration was 0.5 mg/L, pH was 73, and temperature was 40 degrees C. Morphology and crystal phase of calcium carbonate were characterized by SEM and XRD. (C) 2015 Elsevier B.V. All rights reserved.