How to judge the quality of anodized aluminium sheets

 　An anodized aluminum sheet is obtained by having the surface of the alu sheet anodized to get an anodizing film. This film, hard and corrosion resistant, helps to extend the service life of the sheet greatly. To judge the quality of anodized aluminium sheets, you should focus on the following 4 aspects.

　　Logo inspection: Each anodized aluminium sheet we usually sees is labeled, and the logo has the standard code and license of the product.
anodized aluminum sheet

　　The thickness of the oxide film: This requires the use of a professional eddy current thickness measuring instrument for testing.

　　Surface quality inspection: In addition to cleaning the surface of the anodized aluminum plates, we need to see more things. For example, we should check whether the aluminum plate has some cracks or some corrosion. These are all It requires careful observation to discover.

　　Sealing quality acid leaching method: The formation of the sealing is formed after the anodic oxidation. If these sealings are not well treated, it will cause the subsequent corrosion of the aluminum plate. Usually the detection method we carry out is the acid leaching method, that is, after removing the dust on the surface, drop nitric acid on the surface, wipe it gently, wash off the nitric acid with water, and then drop purple syrup on the surface, and wipe it off after one minute. See if there are any obvious traces on the surface. If there are, it means that the sealing is not done well.

　　If you have more questions about anodized aluminium sheet quality, welcome to contact us!

Reprinted from http://haomei-aluminium.com/en/News/Knowledge/how-to-judge-anodized-alu-sheet-quality.html

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