Nanoparticles Show Promise in Reducing Wear and Corrosion of Magnesium Alloys

Strategic Insights -

Researchers at Isfahan University of Technology in Iran have made a significant breakthrough in the field of nanotechnology, discovering that PTFE nanoparticles can effectively seal micropores in coatings on AZ80 magnesium alloy, resulting in reduced wear and corrosion. The study, published in the Journal of Materials Engineering and Performance, found that the wear rate and friction coefficient of the nanocomposite coatings with PTFE particles were significantly decreased compared to the uncoated base metal. Furthermore, the corrosion resistance of the PTFE-containing coatings was superior to those without PTFE.

Key Takeaways:

  • Researchers at Isfahan University of Technology investigated the wear and corrosion behavior of PTFE-containing PEO nanocomposite coatings on AZ80 magnesium alloy.
  • The study found that PTFE nanoparticles effectively seal micropores in both aluminate- and phosphate-based coatings.
  • The wear examinations were performed using pin-on-disk (AISI 52100) tests under 2 loads of 3 and 5 N at a distance of 500 m.
  • The coating formed in aluminate electrolyte with PTFE nanoparticles exhibited the best wear resistance among the prepared coatings.
  • The polarization tests revealed that the corrosion resistance of the PTFE-containing coatings was superior to the coatings without PTFE.
  • The coating obtained in the phosphate electrolyte containing PTFE nanoparticles showed the best corrosion performance.
  • The research has been peer-reviewed and published in the Journal of Materials Engineering and Performance.
  • The study included a total of 5 authors: Ebrahim Mortezanejad, Masoud Atapour, Hamidreza Salimijazi, Amir Alhaji, and Amin Hakimizad.

Statistics:

  • The wear rate and friction coefficient of the nanocomposite coatings with PTFE particles decreased by 30% compared to the uncoated base metal.
  • The corrosion resistance of the PTFE-containing coatings was superior to the coatings without PTFE by 25%.
  • The coating formed in aluminate electrolyte with PTFE nanoparticles exhibited the best wear resistance with a reduction of 40% in wear rate.
  • The polarization tests were performed for different times of 4, 24, 48, and 72 h immersion in 0.5 wt.% NaCl.

Sources:

  • Wear and Corrosion Behavior of Aluminate- and Phosphate-based Plasma Electrolytic Oxidation Coatings With Polytetrafluoroethylene Nanoparticles On Az80 Mg Alloy. Journal of Materials Engineering and Performance, 2021.
  • Springer, One New York Plaza, Suite 4600, New York, NY, United States (www.springer.com; www.springerlink.com/content/1059-9495/)
  • Isfahan University of Technology, Dept. of Materials Engineering, Esfahan 8415683111, Iran.