It is experimentally shown that voltages and currents are produced when conducting solutions are made to flow through a water treatment device that uses magnetic fields. The magnitude of this voltage is found to vary with the solution flow rate in accordance with well-known laws of physics governing the motion of charged particles under the influence of a magnetic field. Current vs flow rate plots and surface pH measurements yield results that are in accord with the presence of enhanced corrosion of the metal housing of the device. It is postulated that the current generated magnetohydrodynamically produces a precipitation initiator that favors the precipitation of scaling salts in the bulk of the solution rather than on the walls of the plumbing.