In mechanical engineering for increase of corrosion resistance of details of machines and tool use different methods of processing. Object of the conducted researches - thermal and chemicothermal treatment of steel products at anode process of electrolytic heating.   It is known the way of chemicothermal treatment in the water electrolyte, containing to g/l: NH4Cl 110 and NH4OH 50 or NH4Cl 110 and NaNO3 110. But tempering in electrolyte or on air not always provides necessary anticorrosive and antiwear properties of the modified surface.   To reduce fracturing when tempering in aqueous solutions it is necessary to provide uniform cooling of all surface of a detail. In order to avoid emergence on a surface of a detail of zones with the lowered speed of heat removal it is necessary to create or circulation of these coolants, or to move a detail concerning a coolant. It complicates tempering process. In comparison with water and aqueous mediums, oil hardening has advantage, first of all, because of small cooling rate thanks to that emergence of hardening defects decreases and constancy of the tempering ability in a wide interval of temperatures of the environment is provided (20-150 0С) [1].   The way of nitriding and tempering in one capacity, without dredging of a detail was developed. This way of anode chemical heat treatment, includes a detail warming up in the water electrolyte containing compounds of nitrogen and tempering of a detail. Processing is carried out in one capacity in not mixing up liquids with different specific weight. At the same time chemicothermal treatment of a detail is carried out in electrolyte, and tempering - in not electrowire hardening environment (oil) being either under electrolyte, or over it.   Samples from steel 45 a dimeter of 8 mm and 10 mm high were exposed to processing. Corrosion tests carried out in 0,05M solution of Na2SO4. Electrolyte, g/l: NH4Cl 110 and NH4NO3 with the specific weight of 1.15 g/cm3. Tempering was carried out in MS-14 diesel oil with the specific weight of 0.89 g/cm3 and light FCX-330 fluorocarbon oil with the specific weight of 1.994 g/cm3.   Tempering of a detail in oil after chemical heat treatment reduces currents of anodic dissolution by 38-43% at the potential -0,1 B, for 38-47,5% at potential 0,1 B; reduces corrosion losses by 39-42% at 8 hours of tests, for 37-47% - at 24 hours and for 50-55,5% - at 72 hours. At the same time surface microhardness - from 5850 MPa on a prototype increases to 6820 and 7300 MPa when tempering in oils.   Increase in corrosion resistance and microhardness of a worked surface, thanks to more uniform distribution of temperatures on a surface of the processed detail as a result of combination in one capacity of chemicothermal treatment and tempering, without dredging of a detail was as a result received.