Today's topic is "TheInformation on anodized film thickness/densityThis is a note from.
It's difficult to find information on the film thickness and density of anodized aluminum, butSome processing manufacturers also provide mass per unit area information.Here, I will note down information for simpler calculations that do not require such data.
Anodized film thickness and density
First, as basic knowledge, alumite (anodizing) itself isThe layer of aluminum oxide (called alumina, Al2O3) that forms on the surface of aluminumtherefore considered to be close to the density of aluminum, and its alumina Al2O3Typically around 3.9 g/cm³is considered the density of.
Anodizing treatment varies in film thickness depending on the type of anodizing. The main types of anodizing and their film thicknesses are as follows.
- Anodizing treatment such as white anodizing: 5-25 μm
- Hard anodizing: 50μm
And anodizing is, within the processing steps,The material melts, and a 2x anodized layer is formed there, so half of the anodized treatment enters the material relative to the material surface, and half forms a film on top of the original material surface. will be.
Therefore, the formula for calculating the weight of the anodized layer in a simplified calculation is as follows.
- Surface area of anodized aluminum × 1/2 total film thickness × density (3.9g/cm³)
This anodizing process can vary depending on manufacturing conditions such as temperature, current, and electrolyte type, and the processing manufacturer controls these factors to generate the anodized layer.
That's it.
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