Cast aluminum alloy micro-arc oxidation ceramic membrane layer and preparation method thereof
A technology of casting aluminum alloy and micro-arc oxidation, which is applied in anodic oxidation and other directions, can solve the problems of rough surface, poor surface quality of ceramic film layer, and reduce the wear resistance of surface ceramic layer, so as to achieve small roughness, smooth surface, and improved The effect of wear resistance
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Embodiment 1
[0026] Raw material preparation: 15g / L Na 2 SiO 3 ?9H 2 O, 3g / L Na 2 MnO 4 ?2H 2 O, 3g / L NaF, 8g / L NaOH, 1g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.
[0027] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 10 minutes, then magnetically stir for 20 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.
[0028] A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current...
Embodiment 2
[0030] Raw material preparation: 5g / L Na 2 SiO 3 ?9H 2 O, 8g / L Na 2 MnO 4 ?2H 2 O, 8g / L NaF, 3g / L NaOH, 3g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.
[0031] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 15 minutes, then magnetically stir for 15 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.
[0032] A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current ...
Embodiment 3
[0034] Raw material preparation: 10g / L Na 2 SiO 3 ?9H 2 O, 5g / L Na 2 MnO 4 ?2H 2 O, 7g / L NaF, 6g / L NaOH, 5g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.
[0035] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 20 minutes, then magnetically stir for 10 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.
[0036]A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current ...
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