Features of electrochemical and corrosion behavior both electrospark coatings (ESC), and pure metals, them components, in sour, neutral and alkaline environments was reveal. It are established, that the electrochemical behavior and corrosion resistance of ESC was caused by phase structure, a roughness of a surface and porosity of the coatings, formed by pair a substrate - electrode and regimes of coating. Intermetallic Ti₂Ni, not present the basic phase, it are forming only at alloying of titan by nickel, at a reverse alloying it are not present. In other cases, corrosion resistance of ESC is causing by presence of nitride of the titan in it.  In the majority of acids, alloying of steel St.3 by metals leads to raise of corrosion resistance. Thus in 48 percent of sulfuric acid the most major magnification of corrosion resistance of St.3 (≈ in 6, 5 times) are receiving alloying by nickel. Only titanium and nickel was more non-corrodible in the same conditions. Collateral alloying by titanium and nickel less efficiently, but are better, than alloying by one titanium. Corrosion rate in hydrochloric acid of alloyed steel decreased ≈ in third times and little depended on a material of a coat, but remained considerably above, than at titanium, nickel, molybdenum and an alloy TNM-20. Collateral alloying by titanium and nickel did not yield the plus effects. Corrosion rate of a steel with a titanium-nickeliferous coat approximately same as at a steel with a titanium coat and in ≈ 1, 5 times was higher, than with a nickeliferous coat. The maximal magnification of corrosion resistance of a steel with titanium and nickeliferous coats are observe in water (more, than on order) and especially to 20 % chloride of sodium (more, than on two orders). However, despite magnification of corrosion resistance of a steel with titanium and nickeliferous coats several times, her corrosion rate in sour medium are remained high, and it are possible to expect fast enough activation of samples.  Coating of a steel led to drift of stationary potential in the positive side, especially in first 50 minutes of trials in model medium. Highly essential influence of a roughness of surface are thus observed: the it less, the more positive potential in this time term. In the greatest drift of values of stationary potential in the positive side resulted coating of nickel by titanium and especially - titanium by nickel (most likely, because of formation in the latter case Ti₂Ni). The most positive potential at titanium.  It are necessary to note, that coating titanium by nickel, nickel by titanium, the turning on of backing material in formative ESC in the form of the various intermetallic, raising corrosion resistance of a surface are the plus factor. However, the same process when coating a steel negatively influenced corrosion resistance of ESC. Therefore it are necessary to develop such composition of electrodes which would provide formation of the modified surface layer only on the basis of non-corrodible alloying constituents of the anode without participation of a substrate for electrospark coating of steels.