Experimentally, it was found that if a second metal component is added to the technological backfill during thermal diffusion chromium plating or if the inert separating additive of corundum is replaced by minerals-solid electrolytes, a current appears in the technological backfill directed to the saturable part. The appearance of an electric field is due to the emission of electrons (metal components of the filling) and oxygen anions (solid oxide electrolytes). It is determined that the emission flux makes a contribution to the saturation process that is commensurate with the diffusion flux formed according to Fick's laws. Experiments show an acceleration of diffusion processes and an increase in the depth of the diffusion layer of chromium by 2–2.5 times.