BOUTAREK Naima University of Science and Technology Houari Boumediene

Spoluautoři TENDJAOUI Adel, ZAÏD Bachir

Surface coatings, like titanium nitride (TiN) coating, offer high wear resistance and good friction performance for a wide range of applications. The structure and the composition of films deposited on stainless steel establish almost their corrosion resistance. In this study, Ti/TiN multilayer films were synthesized on a conventional 304 stainless steel using a PVD method. TiN coatings can be obtained in a relatively wide range of compositions around stoichiometry 1:1. The crystal structure of the coatings was carried out by X ray spectrometry analysis, optical and scanning electron microscopy.and X-ray diffraction (XRD). The mechanical properties such as hardness, was analyzed by means of microhardness, The corrosion behavior of titanium nitride (TiN) coatings was investigated by electrochemical methods, such as potentiodynamic polarization test. The anodic polarization characteristics were measured in a NaCl (9g/l) solution and H2SO4 (0,5M) + NaCl (3,5%) solution at room temperature. Electrochemical tests were used to evaluate the effect of microstructure on the corrosion behavior of TiN coatings exposed to a corrosive environment. After treatment, improvement in corrosion resistance was showed. The corrosion resistance studied in both solutions is examined, and the electrochemical behaviour of samples was discussed. A correlation between surface structure and electrochemical properties is presented. The results will be presented and discussed in details in the International Conferences on Advances and Trends in Engineering Materials and their Applications.

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