This study was devoted to the case of electrodeposition of binary alloys of iron group metals with tungsten. Namely, co-relation between volume current density (ratio of applied current vs bath volume) and microhardness has been established for Co-W alloys deposited from gluconate bath, Fe-W and Ni-W alloys deposited from citrate baths. It has been detected that microhardness of the coatings decreases with working area of the samples deposited at the same current density: for CoW coatings at 20 mAcm-2, for Fe-W and Ni-W at 100 mAcm-2. Effect of VCD is shown as macroscopic size effect of microhardness (influence of the surface size of the electrode on microhardness at fixed current density (in A/dm2) and fixed volume of electrolyte or influence on the microhardness at fixed current density and size of plated surface from different electrolyte volume. The microhardness of the chromium and nickel coatings does not depend on the surface area being plated and, therefore, on the VCD as the current density was maintained at a fixed level during the electrodeposition. In contrast, under the electrodeposition of alloy Co-W, Fe-W, Ni-W the microhardness exhibited a correlation with the BCD as given in Fig. 1.  In the case of Fe-W and Co-W alloys: with VCD in the range from 8 to about 200 – 400 mA L-1, the W-content of the coatings remains fairly constant. At constant bath temperature, the influence of VCD on the current efficiency was not observed. The influence of the VCD on structure and morphology of the coatings take place. Namely, the XRD patterns transform from nanocrystalline to amorphous-like with increasing of size samples.