Anodic Oxidation Process of Honeycomb Aluminum Plate

In recent years, inHoneycomb aluminum plate、铝塑板和Honeycomb Panel的Surface treatment技术中，有向anodic oxidation处理技术发展的趋势。对于铝板、铝塑板和Honeycomb Panel的anodic oxidation处理，应注意anodic oxidation膜厚度的均匀性、颜色的均匀性和重现性。而要确保anodic oxidation膜厚度的均匀性、颜色的均匀性和重现性，则必须严格控制铝合金的化学成分和anodic oxidation的生产工艺。

1Strictly control the casting production process. The control range of the chemical composition of the honeycomb aluminum plate ingot must be as small as possible, and the chemical composition must be uniform. In addition, the melting process, the casting process, and the homogenizing treatment process must be strictly performed.

22. Appropriate tooling and fixture shall be selected. Honeycomb aluminum plate mounting fixture material must ensure good conductivity, the general use of copper or copper alloy fixture. The used special or general-purpose tools and fixtures such as anodic oxidation treatment must be used again, and the surface oxide film must be removed to ensure good contact.

3Strictly control the anodic oxidation temperature. From the anodic oxidation film formation mechanism, it can be known that when the anodic oxidation temperature is low, the oxide film is dense and the porosity is small. With the increase of anodic oxidation temperature, the oxide film gradually becomes loose, the porosity gradually becomes larger, and the color of the film gradually becomes darker with the increase of temperature. Therefore, the anodic oxidation temperature is an important factor in determining the density of the oxide film, and it is also an important factor in determining the color uniformity of the oxide film.

4Strictly control the anodic oxidation current density. As the current density increases, the color of the oxide film gradually darkens, and the thickness of the film first becomes thicker and then thinner. The reason is that the current density increases, the pores of the film increase, and it is easy to color.;The current density decreases, the growth rate of the film decreases, and the film is dense, so as the current density increases, the color of the oxide film gradually becomes darker. In the case of other conditions unchanged, increase the current density, the oxide film growth rate.

It can shorten the oxidation time, reduce the amount of chemical dissolution of the film, the film is hard, and the wear resistance is good. However, the current density should not be too high, otherwise it will be due to the influence of Joule heat, the thermal effect in the membrane hole will increase, the local temperature will rise significantly, the dissolution rate of the oxide film will accelerate, and the film-forming speed will decrease. That is to say, the current density increases, and the film formation rate can be increased within a certain range, but after reaching a certain value, the film formation rate decreases. The size of the current density directly affects the uniformity of the oxide film color.

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