The influence of the temperature difference in the electrode of the cell spaces on the electromotive force and SCC in the presence of an electrolyte in the red - ox system. It was found that using lead and graphite electrodes in the iron red - ox systems, you can create the conditions for the formation of EMF. It is shown that the maximum voltage in the galvanic couple Pb-C observed when the concentration of iron (II) 1 g / l of iron ions and (III) 1 g / l, a thermostatic at 900C and space cell, it is equal to 630 mV, and the value SCC ion concentration is set at the Fe (II) 20 g / l and is 3,5mA.