Rezumat
CZU 621.793:620.178.16
The corrosion protection properties of TiN (d ~ 15–25 nanometers) nanocrystalline coatings related to the substrate of 12Х18Н10Т stainless steel was studied in a 3% solution of NaCl via electrochemical method. It is shown that in the range of the thickness 1–9 μm, protection properties of the coatings formed by the vacuum-arc method, mainly depend on the thickness and the factors which affect the level of residual stresses in them, which determines their defects (porosity). Such factors are: the deposition rate, the plasma flow density near the substrate surface and the amplitude of the substrate pulse bias, as well as the reaction gas pressure.
Keywords: nanocrystalline coatings, titanium nitride, protection properties, corrosion resistance, residual stress, electrochemical activity.