Alloys on the base of iron group metals, codeposited with tungsten, in particular Co-W alloys, possess high hardness, wear resistance and the minimal friction factor and can be alternative to chromic coverings. The results of the study of correlation between characteristics of deposited covering and conditions of electrolysis in gluconate electrolytes are presented in the paper. The received coverings roughness was estimated by means of a profilograph-profilometer Surtronic-25 (Taylor-Hobson, Great Britain). Current efficiency of the deposited alloy was defined gravimetrically after electrolysis in galvanostatic mode. Morphology of the covering surface was studied by the SEM method with TESCAN VEGA scanning microscope. Local elemental content of covering has been defined by the INGAEnergy EDX system. An electrolytic plating structure was investigated by the method of phase x-ray analysis using x-ray difractometer DRON-UM1. Microhardnessmeter ПМТ-3 was used for alloys microhardness definition on the samples with the 25-30 μ thickness. It is established that the current efficiency grows with the increase of current density and falls passing maximum and at the current density 5 A/dm2 gets its minimum. Such current density current efficiency dependence can be the factor influencing uniformity of metal distribution on sample surface. In the case of depositing covering from gluconate solutions Ra parameter was essentially less (0.2 μ), than at the coverings plated from citrate electrolytes (0.9 μ). Optimal electrolysis conditions for covering plating with the high tungsten content (> 20 %) and a small roughness are defined. Alloying additives and pH of the gluconate solution influence the alloy crystallisation and the size of nanocrystalline phases. The increase of tungsten content in coverings to 20 % leads to formation of deposit with a highly dispersed structure. This phenomenon can be caused by the increase of alloying additives diffusion mobility and therefore by increase of the germs growth rate. The deposited films of alloys with the 15 % tungsten content represent a solid solution on an α-cobalt basis and are distributed on a substrate at more or less regular intervals and no association in assemblies is observed. At the increase of pH up to 8 on a deposited surface defects are observed in the form of assemblies of small crystalline grains. Co-W films obtained at pH = 5-7 and the current density of 1 A/dm2 were polycrystalline. At solution pH = 8 formation of Co3W film was detected. With in the current density increase up to 3-5A/dm2 and pH=5-7, amorphous coverings are formed. On the diffraction patterns of studied samples dim lines are registered with a maximum at θ = 28.4 °. But at pH = 8 the polycrystalline α-Co phase formation appeared again. Depending on electrolysis conditions, amorphous film transition in a crystal form is possible and crystal Co3W compound is formed in the areas enriched by tungsten. The mechanical characteristics of studied coatings were similar or better than these of the previously studied samples from citrate electrolytes. The friction factor of the coating samples deposited from gluconate solution was low and less than this of the samples deposited from citrates electrolytes. The defined microhardness was on the level of 650-700 kg/mm2.