Abstract
In this study, the Cr(N,O)/CrN double-layered coatings on tool steel were deposited using cathodic arc deposition process. CrN layer was first deposited on tool steel as an interlayer to ensure better adhesion. Then Cr(N,O) was deposited as a surface layer. The Cr(N,O) composition was varied by changing the O 2/N 2 flow ratios during the coating process. The phase structure, chemical composition, and morphology of coatings were observed by utilizing X-ray diffractometer, Auger electron spectrometer and AFM. The corrosion behavior of coatings was investigated using polarization and immersion tests. Polarization test of coatings was carried out in the solution of 3.5 wt.% NaCl. For immersion test, Cr(N,O)/CrN double-layered coatings were exposed under H 2SO 4 environment for 26 h. The results showed that the corrosion resistance of Cr(N,O)/CrN double-layered coatings with thinner thickness with thinner thickness was better than that of CrN single layer since pinholes of coatings was inhibited by double layer structure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
