A preparation method of micro-arc fluorination of composite film on magnesium alloy surface
A surface composite and magnesium alloy technology, applied in the direction of surface reaction electrolytic coating, coating, electrolytic coating, etc., can solve problems such as restricting application, refractory fluoride film composition and tissue regulation, hindering the dissolution of magnesium alloy matrix, etc., to achieve supply sufficient effect
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Embodiment 1
[0029] A kind of magnesium alloy surface composite membrane micro-arc fluorination preparation method, first carry out alkaline degreasing, water washing to the magnesium alloy sample that size is 16 mm in diameter, thick 5 mm, then in 30g / L sodium fluoride, 50mL / L The micro-arc fluorination treatment was carried out in the micro-arc fluorination solution composed of hydrofluoric acid and 950mL / L tap water. The voltage of the micro-arc fluorination treatment was 50V, the duty cycle was 50%, and the micro-arc fluorination time was 5min. After the micro-arc fluorination treatment, the above-mentioned magnesium alloy component is washed with water and dried. Macroscopic observation shows that the surface of the obtained magnesium alloy sample is silvery white.
[0030] as attached figure 1As shown, according to Example 1, when the voltage is 50V, the sodium magnesium fluoride and the magnesium fluoride composite film prepared by the micro-arc fluorination method have been observ...
Embodiment 2
[0035] A kind of micro-arc fluorination preparation method of magnesium alloy surface composite film, first carry out alkaline degreasing and water washing to the magnesium alloy sample whose size is 16 mm in diameter and 5 mm in thickness, and then in 15g / L sodium fluoride, 25mL / L The micro-arc fluorination treatment was carried out in the micro-arc fluorination solution composed of hydrofluoric acid and 975mL / L tap water. The voltage of the micro-arc fluorination treatment was 70V, the duty cycle was 50%, and the micro-arc fluorination time was 5min. After the micro-arc fluorination treatment, the above-mentioned magnesium alloy samples were washed with water and dried. The macroscopic observation showed that the surface of the magnesium alloy sample was silvery white, and then the scanning electron microscope observation and energy spectrum analysis were carried out on the magnesium alloy sample.
[0036] as attached image 3 As shown, the sodium magnesium fluoride and the...
Embodiment 3
[0039] A kind of micro-arc fluorination preparation method of magnesium alloy surface composite film, first carry out alkaline degreasing and water washing to the magnesium alloy sample whose size is 16 mm in diameter and 5 mm in thickness, and then in 15g / L sodium fluoride, 25mL / L The micro-arc fluorination treatment was carried out in the micro-arc fluorination solution composed of hydrofluoric acid and 975mL / L tap water. The voltage of the micro-arc fluorination treatment was 100V, the duty cycle was 70%, and the micro-arc fluorination time was 1min. After the micro-arc fluorination treatment, the above-mentioned magnesium alloy samples were washed with water and dried. Macroscopic observation shows that the surface of the magnesium alloy sample is silvery white.
[0040] as attached Figure 5 As shown, the sodium magnesium fluoride and magnesium fluoride composite films prepared by the micro-arc fluorination method in Example 3 show under a scanning electron microscope th...
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