Abstract
Abstract In this work, PEO (plasma electrolytic oxidation) coatings were produced on AZ91D magnesium alloy using two-step PEO (plasma electrolytic oxidation) technique. Microstructure and phase composition of the two-step coatings were analyzed using SEM, and XRD, respectively. From the microstructural analysis, it was found that the microstructural features of the primary coatings significantly influenced the properties of the secondary step PEO coatings. Further, it was found from the structural analysis that unlike the primary coatings, discharge channels in the secondary coatings are directional in nature. From the XRD patterns, major phases in the coating were detected as ZrO2, MgO and Mg2SiO4 along with some minor phases. Due to the excellent structural properties of the coatings obtained through secondary step process, hardness and corrosion results of the coatings were significantly improved. The highest corrosion resistance measured through potentiodynamic experiment was found as ~ 505.3 × 103 Ω/cm2, with the hardness value for the same specimen as ~ 1170.24 HV.
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.
