Abstract: An electromagnetic field treating device includes a conduit formed of nonmagnetic material having an inlet and an outlet such that fluid can pass through the conduit in a direction which is parallel to the axis of the conduit, and a ferromagnetic core which includes a corkscrew shaped core portion which is positioned within the conduit in parallel spaced relation thereto. The electromagnetic fluid treating device also includes means for mounting the core in a fixed position within the conduit, and at least one electromagnetic coil which is electrically insulated from the conduit and is positioned adjacently outside of the conduit so that the central axis of each coil either intersects or nearly intersects the core. The electromagnetic fluid treating device preferably has one or two electromagnetic coils which are each mounted sidewardly from the conduit to face toward the ferromagnetic core such that the central axis of each coil is perpendicular to the conduit.

Abstract: A method and system for utilizing variable frequency electromagnetic energy to inhibit, prevent, reverse, or alter the formation of rust or scale on various liquid contacting surfaces is disclosed. Initially, electromagnetic test signals of varied frequency are directed into a fluid filled system at a first location. The current intensity of the signals are simultaneously measured at a second location some distance from the first location. The measured current intensity, relative to the varied frequency of the test signals, provide an energy absorption/emission profile of the liquid. A treatment frequency--generally the frequency at which maximum absorption is observed--is then selected from such absorption/emission profile and treatment is carried out at such selected frequency.