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Enhancement of the Ti‐6Al‐4V alloy corrosion resistance by applying CrN/CrAlN multilayer coating via Arc‐PVD method
Author(s) -
AziziMalekabadi Masoud,
Bakhshi Hamed,
Shahbazi Hossein,
Nosrati Hassan
Publication year - 2021
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13763
Subject(s) - materials science , tin , corrosion , coating , physical vapor deposition , metallurgy , dielectric spectroscopy , alloy , cathodic protection , cathodic arc deposition , layer (electronics) , chromium nitride , composite material , electrochemistry , electrode , nitride , chemistry
In this study, the Ti‐6Al‐4V substrate was coated by CrN‐CrN/TiN‐TiN and CrN/CrAlN multilayer coatings using the cathodic arc physical vapor deposition (Arc‐PVD) method. The results of potentiodynamic polarization (PDP) have shown the lowest and highest corrosion current density belong to the double‐layer (0.16 µA/Cm 2 ) and TiN (0.51 µA/Cm 2 ) samples, indicating the higher corrosion resistance of the double‐layer coating. The field emission electron microscope (FESEM), X‐ray diffraction pattern (XRD), open circuit potential (OCP), PDP, and electrochemical impedance spectroscopy (EIS) analysis were employed in order to characterize the coatings and evaluate their corrosion behavior. Finally, applying the double‐layer coating resulted in the significant improvement of the protective behavior of the Ti‐6Al‐4V alloy, as compared to the sample coated with TiN in corrosive environments.