The metal activity of insulated aluminum coil is strong and easy to be oxidized, because the oxidized insulated aluminum coil will produce a dense alumina film, which will hinder the continuous reaction with aluminum, so the white spot of insulated aluminum coil should be normal. So how does the white spot of insulating aluminum plate come into being? What can we do?
For the insulated aluminum coil with strict surface requirements, how to avoid the occurrence of white spots on the surface of the insulated aluminum coil, so as to improve the product smoothness and brightness, which is not only related to the processing technology, but also closely related to the later surface treatment process.
Book processing heat insulation aluminum alloy anodized products to find white spots after surface treatment, especially the insulation alumina volume is relatively obvious, heat insulation aluminum roll after oxidation washing is not complete, resulting in the surface after drying white spots, to solve the need to strengthen oxidation after washing, try to choose to spray thoroughly. At the same time, pay attention to the surface protection after cleaning, try to keep the product from contacting with other products and air dry naturally.
In other words, if you want to better control the white spots on the surface of the insulated aluminum coil, you should not only pay attention to the surface treatment of the product, but also pay attention to the prevention of surface treatment to avoid the formation of white spots with standard and strict processing flow and process. It is OK to clean white spots, acid wash and alkali wash, but the concentration should be controlled, otherwise spray paint, block aluminum and oxygen contact.
The above is the relevant content that the aluminum coil manufacturer introduces to you why the insulation aluminum plate has white spots and how to deal with them. To learn more, please visit the website: