Influences of electrolytes on tribocorrosion performance of MAO coating on AZ31B magnesium alloy in simulated body fluid

In this paper, the effects of electrolytes on the corrosion resistance and tribocorrosion performance of micro-arc oxidation (MAO) coatings on AZ31B magnesium (Mg) alloys in simulated body fluid (SBF) were studied. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were utilized to explore the microstructure, surface morphology, and phase components of the MAO coatings. Corrosion and tribocorrosion performance of MAO coated Mg alloys were evaluated by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and a ball-on-disk tribotester. It was found that MAO coating produced in electrolyte containing both Na2SiO3 and Na2B4O7 exhibited superior corrosion resistance and tribocorrosion performance in the SBF.

Automated summary

The study found that MAO coatings produced in electrolytes containing both Na2SiO3 and Na2B4O7 exhibited superior corrosion resistance and tribocorrosion performance in simulated body fluid (SBF).