Heating of metals in the electrolyte plasma is one of the methods for high-speed electrochemical and thermal treatment of metals and alloys. The heart of the phenomenon is the formation of a continuous stable gas-vapor envelope (GVE) in a small area around the electrode due to local release of ohmic heating. Heat flow from the envelope to the anode causes to its heating up to 450– 1100 °C. As a result, surface saturation by light elements from solution is possible (carburizing, nitrocarburizing, etc., including surface hardening) [1]. The anodic plasma electrolysis is realized in different apparatuses, which varies in the way of cooling of electrolyte. Nowadays, anodic carburization is known enough for the treatment with flowing electrolyte [2]. However, there are only a few recommendations for carburization in apparatuses with non-flowing electrolyte. In particular, the high efficiency of electrolytic cell equipped with air bubbler was shown [3]. The research of thermal and electrical parameters of anodic plasma electrolysis in bubbling cell was the purpose of present research. The hexagonal samples (height 15 mm, facet 4 mm) of steel 20 (% mass.: 0.17–0.37 Si, 0.35–0.65 Mn, 0.25 Cu, 0.25 Ni, 0.04 S, 0.17–0.24 C, 0.035 P, 0.25 Cr, 0.08 As) were carburized. Aqueous solution of ammonium chloride (2 mole/l) with glycerol (1 mole/l) is used as working electrolyte (volume 3.5 liters). Bubbling of air from nozzle, located at the bottom of the working chamber under the workpiece, was used for intensity of circulation in the cell. The experiment included two cycles of carburization (100 min per cycle) with different air flow rate (v): 25 and 90 l/h. Every operation was executed during 10 minutes with constant voltage 240 V with hardening in electrolyte. Enhancement of heat transfer between the solution and the heat exchanger with increasing v leads to decrease both average and maximum temperature of the electrolyte Tel: e.g. the temperature varies from 40 to 50.6 °С (v = 25 l/h) and from 36.5 to 41.5 °С (v = 90 l/h) at time of the electrolyte usage from 10 to 100 min. Decreasing of rate of evaporation of volatile components of the electrolyte from 2 to 1.5 ml/min is a consequence of reducing the temperature of the electrolyte. Increasing of air bubbling rate to 90 l/h leads to stabilization of anode temperature (Tan) in the range 870–880 °С, whereas there is a significant fall of temperature from 918 to 785 °C at 25 l/h. This fact is explained by stabilization of GVE thickness in consequence of heat transfer intensification. Increasing of air flow rate alters the nature of changes in current density in the system: so, it rises from 1.29 to 1.48 A/cm2 at v=25 l/h and decreases from 2.02 to 1.85 A/cm2 at v = 90 l/h. Mass change of tempered workpieces increases from 0.4066 to 0.4297 g and decreases from 0.5544 to 0.4354 g respectively, which is also associated with intensity of heat transfer between the electrolyte and the heat exchanger and with changing of GVE thickness. Thus, the dependence of process parameters, mainly correlated with the known data for cells with flowing electrolyte. However, a significant factor in the changes of process parameters is the velocity of air flow, which determines the intensity of heat transfer in the system.