Method for preparing high emissivity anodized film layer
An anodic oxidation film and anodic oxidation technology, applied in anodic oxidation and other directions, can solve the problems of reducing the stability of parts and large cracks, and achieve the effects of reducing flow marks, fast coloring, and uniform coloring effect
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Embodiment 1
[0056] Select an aluminum sheet made of 5A06, with a length of 100mm, a width of 50mm, and a thickness of 5mm, which is anodized and colored. Take the example of preparing 5L bath solution for each process.
[0057] (1) Pretreatment
[0058]1) Prepare a chemical degreasing solution with the concentration of sodium phosphate 50g / L, sodium carbonate 25g / L, add 250g sodium phosphate, 125g sodium carbonate, and water to the degreasing tank, and use it after the solution is fully dissolved. Put the aluminum sheet into the degreasing liquid to clean the oil stain on the surface, the temperature is 50°C, and the time is 15 minutes. After degreasing, put the test piece into running hot water to wash once, and then put it into running cold water to wash once.
[0059] 2) Prepare the alkali etching solution with a concentration of 30g / L sodium hydroxide, add 150g sodium hydroxide to the alkali etching tank, and the rest is water, and use it after the solution is fully dissolved. Put ...
Embodiment 2
[0070] Select an aluminum sheet made of 5A06, with a length of 100mm, a width of 50mm, and a thickness of 5mm, which is anodized and colored. Take the example of preparing 5L bath solution for each process.
[0071] (1) Pretreatment
[0072] 1) Prepare a chemical degreasing solution with a concentration of 60g / L sodium phosphate and 30g / L sodium carbonate, add 300g sodium phosphate, 150g sodium carbonate, and water to the degreasing tank, and use it after the solution is fully dissolved. Put the aluminum sheet into the degreasing liquid to clean the surface oil, the temperature is 60°C, and the time is 25min. After degreasing, put the test piece into running hot water to wash once, and then put it into running cold water to wash once.
[0073] 2) Prepare the alkali etching solution with a concentration of 40g / L sodium hydroxide, add 200g sodium hydroxide to the alkali etching tank, and the rest is water, and use it after the solution is fully dissolved. Put the degreased al...
Embodiment 3
[0084] Select an aluminum sheet made of 5A06, with a length of 100mm, a width of 50mm, and a thickness of 5mm, which is anodized and colored. Take the example of preparing 5L bath solution for each process.
[0085] (1) Pretreatment
[0086] 1) Prepare a chemical degreasing solution with a concentration of 70g / L sodium phosphate and 35g / L sodium carbonate. Add 350g sodium phosphate, 175g sodium carbonate and the rest to the degreasing tank, and use it after the solution is fully dissolved. Put the aluminum sheet into the degreasing liquid to clean the surface oil, the temperature is 70°C, and the time is 30min. After degreasing, put the test piece into running hot water to wash once, and then put it into running cold water to wash once.
[0087] 2) Prepare the alkali etching solution with a concentration of 50g / L sodium hydroxide, add 250g sodium hydroxide to the alkali etching tank, and the rest is water, and use it after the solution is fully dissolved. Put the degreased ...
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