The big number of the electrotechnologies, which are widely used in industry, was concerned with flowing of an electric current from one medium in another, or through partition of two mediums. At that, used tensions overlapped value from many kilovolt, as at electrohydrodynamic processing to units volt, as at electrocontact welding. A range of us currents - from shares of ampere at corona discharge to thousand amperes in electrolytic cells. All these methods of processing was concerned with flowing of a current through partition of mediums with formation of double electric zones, channels of through admittance. The variety of processes and physico-chemical transformations, connect with it, frequently was an obstacle of the further perfection of technologies. Researchers displayed interest to the questions concerned with regularity determinant these processes for application of the further efforts on development of strategy of improvement of these methods. The special place among such methods occupied an electrospark method of alloying of surfaces of details, which allowed to increase at small energy consumptions operational durability of details in three, five and more times. Problems at attempts to expansion of sphere of usability of this method begun with qualitative characteristics of forming coverings.  It was determined, that the microgeometry (roughness, waviness) of coats directly are bound with energy of spark pulses, however from same depended also all other parameters of coats. If to be restrict to the given fact an exit in improvement of quality the one - decrease of energy and raise of frequency of pulses, as was solving at the previous stage of evolution of high-tension alloying. However, if such way of decrease of roughness to observe as reception of defocusing of energy of spark pulses there are a cardinal way of the further evolution of high-tension alloying. And this way - research of methods of a defocusing of spark discharge himself. Thus it, not follow to understand saying as a defocusing of the channel of through conductance though and in this direction at determined force it are possible to achieve some success.  In this respect, it are necessary to give special attention to research of the phenomenon of migration of the channel of through conductance along surfaces of electrodes within an individual spark discharge. Control by scanning could be carry out only at the deep insight of processes, which proceeds in discharge time on electrodes and in an interelectrode gap.  The factors, which influence on migration of the channel, was probably bound with: a configuration of electrodes, their surface microgeometry and the processes, which proceeds on electrodes in a discharge time. In addition, the strong effect are influence the processes occur in a gap between electrodes in a prebreakdown and breakdown stage of discharges. As to processes in a sparking gap, main from them process of interacting of directional charges with the polarized space in a prebreakdown stage adjoining to the future channel of the discharge.   At the moment of overlapping by a spark discharge of an interelectrode gap, the potential of the space adjoining to the channel abruptly decreased, and the work made on change of a configuration and of potential of field feed by charge carriers the channel. Interacting of the discharge with potentially significant bands that, thus, constantly changed, cannot but no affect on the transverse scanning of the channel of discharge in an interelectrode gap. As velocity of drift of charges along dielectrics will be low scanning of the subsequent discharges will be occur into account prehistory of situation of often repeated discharges.