Removal of Scale Deposition on Pipe Walls by using Magnetic Field Treatment

The scaling power of the treated water was estimated through an electrochemical scaling test. Chroamperometric curves and chronoelectrogravimetric curves were plotted to obtain the scaling time and the nucleation time of the scale deposition. The variation of the efficiency of the magnetic treatment was studied when the length of treatment, the flow velocity of the scaling water in the device, the material of the pipe where the scaling water flowed were changed. The scale removal ef�ciency was evaluated based on calcium concentration in the outlet, after passing through the magnetic �eld. Magnetic strength was varied between 0.1 T to 0.4 T to investigate its effect on scale reduction. The morphology were analyzed by �eld emission scanning electron microscope. It was found that magnetic �eld enhanced scale removal from pipe walls by 46.7%. With respect to the increasing the magnetic �eld strength to 0.4 T, the ef�ciency of removal also increased to 30%. Possible mechanisms involved in the magnetic treatment that affects scale reduction such as the effect of magneto-hydrodynamics and magnetically modi�ed hydration are discussed. Magnetic technology is a simple, cost-effective and environmentally friendly treatment approach for clean water production with signi�cant scale removal ef�ciency.