Abstract
This study investigates the corrosion behaviour of magnesium (Mg-AZ91D) alloy reinforced with nano metal oxides (ZnO, MnO, and TiO2) using the tribocorrosion methodology. The mechanical characteristics of the materials were investigated using ASTM standards for AZ91D alloy, AZ91D/ZnO, AZ91D/MnO, and AZ91D/TiO2 composites. The AZ91D/TiO2 nanocomposite has higher hardness (122.71 HV) and tensile strength due to decreased porosity and smaller grain size (200.7 MPa). The corrosion behaviour of the fabricated alloys and composites was investigated using tribocorrosion test methods at various NaCl concentrations (2–3.5%). AZ91D/TiO2 nanocomposite evidenced least OCP drop (−0.7 to −1.0 V) with minimum COF (0.10) at 2.5% NaCl concentration as a result of the development of a thick oxide layer that protected the surface from wear and Cl- environment throughout the tribocorrosion test. Images of tribocorrosion test samples revealed corrosion pit and crack formation. The elemental mapping and EDAX results validate the formation of Mg2TiO3 precipitates on the AZ91D/TiO2 nanocomposite; at the same time, a tribo-corroded surface profile revealed an optimum wear depth of 55 µm at 2.5% NaCl concentration for the same composition.
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.
