Study on Hydrophobic Surface of Magnesium Alloy Prepared by Femtosecond Laser and its Corrosion Resistance

Abstract Due to their excellent barrier and shielding effects, superhydrophobic magnesium alloy surfaces are increasingly interested in corrosion protection. This paper proposes a method for producing stable surface by laser scanning ablation of AZ31B on its surface. The prepared layered micro-nanoemulsion convex structure with lotus-like exhibited superhydrophobicity after modification stearic acid, the static water droplet contact angle reached 163°. After 90 days outdoor air, pressure-based experiments show that possesses long-term Cassie state. In addition, showed resistance against Neutral 3.5 wt.% NaCl solution. results dynamic potential polarization tests existence gas layer cavity caused current density (3.86±1 uA/cm2) decrease 2 orders magnitude compared extruded (103±1 uA/cm2). We believe proposed is simple, efficient, non-polluting, especially medical alloys field vivo implant materials slow down promote clinical applications.