How to get matte effect on aluminum profile surface

We know that the aluminum alloy surface itself is bright, so how does this matte effect come about? Let's take a look.

In general, the matte effects of the surface are divided into physical and chemical processes. The physical process is generally sandblasting. Emery is used. The aluminum alloy material is passed through the sandblasting machine to cause evenly small pits on the surface of the aluminum profile by the fine and dense sand . It is barely visible to the naked eye. And appearing before our eyes,the aluminum profile is still smooth, but the visual effect changes from light to matte. The different size of the corundum causes influences the effect of spraying on the profile After the aluminum sand blasting, anodizing treatment is performed to form a dense transparent oxide film on the surface to increase the corrosion resistance.

Chemical process is generally divided into alkaline sand, acid sand. Usually in the process of anodizing aluminum profiles, the alkaline sand process is to put aluminum into a higher concentration of alkaline solution for the formation of matte effect. The principle of sour sand is also similar that the aluminum surface is partially etched away. This chemical treatment process will be more natural  on aluminum  profile surface.But it will cause damage to the aluminum profile and not environmentally friendly. Another point is that the chemical processing of the aluminum profile cavity will also have a matte effect, while the sandblasted aluminum profile cavity is still bright. Therefore, it is still necessary to choose the matte processing technology of aluminum profiles according to the product demand.