The influences of heat transfer surface properties on the formation of calcium sulphate deposition were investigated under pool boiling condition with heat fluxes of 55-300 kW/m2 and a saturated CaSO4 concentration at 100 °C. The surfaces of several test heaters were treated by surface modification techniques, such as dynamic mixing ion beam implantation and dynamic mixing magnetron sputtering to reduce surface energy. The results show that heat transfer surfaces with low surface energy reduce CaSO4 sca...