More and more aluminum alloy products are integrated into our lives, ranging from cell phone shells to car accessories. These large and small aluminum alloy parts need some beautification treatment before they can enter normal use. As we all know that the surface of aluminum alloy itself is bright, how is the matte effect of the aluminum alloy shell obtained? Let us introduce below, the matte effect of the surface is divided into physical process and chemical process

1. The physical process is generally sandblasting, using emery

Sandblasting is to pass the aluminum alloy material through the sandblasting machine, so that the fine and dense sand makes even small pits on the surface of the aluminum profile, which is almost invisible to the naked eye. The aluminum profile that appears in front of us is still lubricated, but visually The effect is changed from bright to matte. The particle size of emery is different, and the effect of spraying on the profile is also divided into thickness. After the aluminum profile is sandblasted, it is anodized to form a dense transparent oxide film on the surface. Corrosion resistance.

2. The chemical process is generally divided into alkaline sand and acid sand

Generally, it is carried out during the anodizing process of aluminum profiles. The alkaline sand process is to put the aluminum profiles in a high-concentration alkaline solution to corrode the surface of the aluminum profiles and form a matt effect. The principle of acid sand is similar. It all corrodes part of the surface of the aluminum profile. The surface effect of the aluminum profile treated by this chemical process will be more natural, but it will cause loss to the aluminum profile, and it is not environmentally friendly. Another point is the chemical process. The processed aluminum profile cavity will also have a matt effect, while the sandblasted aluminum profile cavity is still bright. Therefore, it is still necessary to select the matt treatment process for aluminum profiles according to product requirements.

The currently popular mobile phone shells are made of aluminum alloy, the bases of computers and TVs are supported by aluminum profiles, and the cabinet handles are also made of aluminum alloy materials. These aluminum alloy profiles have one thing in common, that is, the surface looks very smooth, but it is not too bright, but has a low-key matte effect.