| Abstract: | Ti-Cr-N coatings were deposited on a low-carbon steel St3 substrate by overlapping of Ti and Cr plasma flows in residual nitrogen atmosphere using ion bombardment. Auger electron spectroscopy and X-ray diffraction were used to analyze the element and phase composition of the deposited coatings. It was established that, under constant deposition conditions (the arc current, gas pressure, bias voltage), coatings possess the fcc structure of a (Ti,Cr)N solid solution with uniform distribution of elements along the depth. The growth of the substrate bias voltage leads to an increase of titanium concentration in the coating due to changes in the interaction processes (condensation and sputtering) of the deposited materials with the substrate. Corrosion tests of the coatings and steel St3 were performed in acid (1 M H2SO4) and salt (3% NaCl) media. It was found that the corrosion processes progress less intensely in salt solution than in acid medium. |
