CORROSION PROPERTIES AND ELECTROCHEMICAL-BEHAVIOR OF NITRIDE LAYERS ON TITANIUM IN SULFURIC-ACID

A study is made of the structure, composition, microhardness, and elec trochemical-corrosion behavior of surface nitride layers (coatings) on titanium obtained by thermodiffusional saturation and condensation wi th ion bombardment (CIB) in 5 N H2SO4 at 50-degrees-C. It is shown tha t the electrochemical and corrosion behavior of titanium with a nitrid e coating is determined by the properties of titanium nitride and the structure of the protective layer. The corrosion resistance of titaniu m increases roughly two orders with the application of thermodiffusion al nitride surface layers and more than three orders with the applicat ion of such layers by CIB.