Method for preparing bioactive calcium phosphate coating on magnesium alloy surface for endosseous implant
A biologically active, brushite technology, applied in metal material coating technology, coating, medical science, etc., can solve the problem of uneven distribution of white deposits on the surface of magnesium alloys, uneven distribution of Ca-P coatings, etc. problems, to achieve the effect of easy operation, low cost, and reduced corrosion rate
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Embodiment 1
[0028] A bioactive Ca-P coating was prepared on the surface of AZ31 (Mg-Al series) alloy. Firstly, the AZ31 magnesium alloy is made into The samples were polished with 320-mesh water sandpaper and No. 3 metallographic sandpaper in turn. Ultrasonic cleaning with absolute ethanol for 10 min, and air-dried. Put the sample in a 20% HF solution and soak it in a water bath at a constant temperature (20°C) for 4 hours, wash it with deionized water and absolute ethanol successively, and dry it. Then put the sample into NaNO 3 : Ca 3 (PO 4 ) 2 :H 2 o 2 =7:4:2 (wt%) solution soaked in a water bath at constant temperature (20°C) for 8h. The scanning electron microscope observed that the thickness of the chemical conversion film was 150nm, and the composition analysis showed that the chemical conversion film was MgF 2 , it was observed that the thickness of the Ca-P coating was 10 μm, and the Ca / P atomic ratio was 1:1. It shows that the prepared Ca-P surface coating has good bi...
Embodiment 2
[0030] A bioactive Ca-P coating was prepared on the surface of NZ30K (Mg-RE series) alloy. Firstly, the NZ30K magnesium alloy is made into The samples were polished with 320-mesh water sandpaper and No. 3 metallographic sandpaper in turn. Ultrasonic cleaning with absolute ethanol for 10 min, and air-dried. Soak the sample in a 60% HF solution in a water bath at a constant temperature (20°C) for 16 hours, wash it with deionized water and absolute ethanol, and dry it. Then put the sample into NaNO 3 : Na 3 PO 4 : Ca(H 2 PO 4 ) 2 :H 2 o 2 =2:2:5:1 (wt%) soak in a water bath at a constant temperature (20°C) for 48 hours. The scanning electron microscope observed that the thickness of the chemical conversion film was 2 μm, and the composition analysis showed that the chemical conversion film was MgF 2 , It was observed that the thickness of the Ca-P coating was 20 μm, and the atomic ratio of Ca / P was 1.05:1, indicating that the surface had good biological activity, and t...
Embodiment 3
[0034] A bioactive Ca-P coating was prepared on the surface of WE43 (Mg-RE series) alloy. Firstly, the WE43 magnesium alloy is made into The samples were polished with 320-mesh water sandpaper and No. 3 metallographic sandpaper in turn. Ultrasonic cleaning with absolute ethanol for 10 min, and air-dried. Soak the sample in a 40% HF solution in a water bath at a constant temperature (20°C) for 8 hours, wash it with deionized water and absolute ethanol, and dry it. Then put the sample into NaNO 3 : Ca 3 (PO 4 ) 2 : Ca(H 2 PO 4 ) 2 ·H 2 O: H 2 o 2 =5:1:2:1 (wt%) soak in a water bath at constant temperature (20°C) for 24 hours. The scanning electron microscope observed that the thickness of the chemical conversion film was 600nm, and the composition analysis showed that the chemical conversion film was MgF 2 , the Ca-P coating thickness was observed to be 30 μm, and the Ca / P atomic ratio was 1.1:1. It shows that the obtained Ca-P surface coating has good biological ...
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