Journal
THIN SOLID FILMS
Volume 516, Issue 11, Pages 3544-3548Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2007.08.069
Keywords
TiN-based superhard coating; cathodic arc plasma deposition; potentiodynamic test; electrochemical impedance spectroscopy
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TiN, TiAlN and TiAlSiN hard coatings were deposited onto AISI H13 tool steel by cathodic are plasma method. X-ray diffraction (XRD) analysis confirmed that incorporation of Al and Si into TiN led to refinement of microstructure. From the results of potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS) test conducted in an aerated 3.5% NaCl solution, the TiAlSiN film showed the best corrosion resistance with the lowest corrosion current density and porosity, the highest protective efficiency and total resistance (pore resistance plus charge transfer resistance). (C) 2007 Elsevier B.V. All rights reserved.
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