In situ growth of namgf on the surface of magnesium alloy 3 nanorod approach
An in-situ growth, magnesium alloy technology, applied in nanotechnology, surface reaction electrolytic coating, tissue regeneration, etc., can solve the problems of long cycle and poor corrosion resistance, achieve simple operation, improve corrosion resistance, and improve antibacterial properties and biocompatibility
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Embodiment 1
[0032] 1. Micro-arc oxidation treatment of magnesium alloy surface
[0033] A 1cm×2cm magnesium alloy was polished on a polishing machine with 1200-mesh and 5000-mesh sandpaper in turn, and then ultrasonically cleaned with acetone and absolute ethanol for 3 times, each time for 10 minutes, and then washed with N 2 Stream dry. Then with 0.0065mol / L Na 3 PO 4 12H 2 O, 0.065mol / L Na 2 SiO 3 9H 2 The aqueous solution of O and 0.065mol / L NaOH is used as the electrolyte, using DC pulse power supply, the discharge voltage is 350V, the frequency is 100Hz, the duty cycle is 30%, and the distance between cathode and anode is 3cm, and the magnesium alloy is subjected to micro-arc oxidation treatment. The treatment time is 10 minutes, and the MgO corrosion-resistant coating is formed on the surface of the magnesium alloy, that is, the magnesium alloy modified by the micro-arc oxidation coating.
[0034] 2. In-situ growth of NaMgF on the surface of micro-arc oxidation 3 nanorod coa...
Embodiment 2
[0040] Example 2 In this example, the surface of the magnesium alloy was subjected to micro-arc oxidation treatment according to the method in step 1 of Example 1, and then the magnesium alloy after the micro-arc oxidation treatment was placed in a polytetrafluoroethylene-lined reactor, and 30mL of 0.05mol / L NaF aqueous solution completely submerged the magnesium alloy, then placed the reaction vessel in a microwave reactor, and reacted at 160°C for 10 minutes under the condition of microwave power of 300W, cooled naturally to room temperature after the reaction, and took out the magnesium alloy Rinse with deionized water and dry at 60°C for 24 hours to obtain NaMgF grown in situ on the surface of micro-arc oxidation. 3 The corrosion current density and corrosion potential of the magnesium alloy coated with nanorods are 1.395×10 -8 A / cm 2 and -1.627V.
Embodiment 3
[0042] In this example, according to the method of step 1 of Example 1, the surface of the magnesium alloy is subjected to micro-arc oxidation treatment, and then the magnesium alloy after the micro-arc oxidation treatment is placed in a polytetrafluoroethylene-lined reactor, and 30 mL of 0.15 mol / L NaF aqueous solution to completely immerse the magnesium alloy, then place the reaction vessel in a microwave reactor, and react at 160°C for 10 minutes under the condition of microwave power of 300W, after the reaction is completed, naturally cool to room temperature, take out the magnesium alloy and use it for deionization Rinse with water and dry at 60°C for 24 hours to obtain NaMgF grown in situ on the surface of micro-arc oxidation. 3 Magnesium alloys coated with nanorods (see Figure 10 ), its corrosion current density and corrosion potential are 3.088× 10 -8 A / cm 2 and -1.571V.
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