Corrosion and wear resistance of PVD-TiN coatings
Keywords:TiN, XPS, Hard coatings, Corrosion, Wear
Surface hardening techniques for metallic alloys are widely used to achieve layers of very high hardness and corrosion and wear resistance. In the present paper TiN coatings are obtained by PVD on a tool steel. The films are characterized by SEM, X-ray diffraction and XPS. Corrosion behaviour in NaCl solution showed the importance of the presence of defects on the PVD coating due to the different electrochemical behaviour of the steel base. Pin-on-disk measurements at approximately 40% RH against a corundum (Al2O3) ball showed a significant decrease in the wear rate compared with the results for the standard tool steel.
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