There are various types of aluminum profiles. Many small partners do not know how to judge when buying. Today Dongguan Lianxin Hardware Co., Ltd. will teach you some simple tips on how to distinguish the quality of the profiles from the appearance of aluminum profiles.

First of all, of course, it is necessary to see if there is any obvious distortion in the appearance of the aluminum profile, and whether the surface is smooth and smooth, whether there are cracks or bubbles, scratches, burrs and other uneven places. If you find something, it is best not to buy it. This is the most obvious problem with quality.

Secondly, it is necessary to carefully check the color of the aluminum profile surface, whether there is a color difference. Color difference means that the quality is not enough. Or you can put the same type of profiles together for comparison, if the color difference is too obvious, it is best not to buy. In addition, it is necessary to check whether the thickness of the aluminum profile is the same as the marked model, and whether there is any inconsistency between the physical object and the mark.

Finally, you can use a smooth hard object to scratch the surface of the aluminum profile, which will leave a white scratch. We gently wipe and observe with our hands. If it cannot be wiped off, it means that the material may have a quality problem. If it can be easily wiped off, it means that the thickness of the oxide film on the surface of the profile is qualified.

Identification of the characteristics of inferior aluminum profiles

1. The chemical composition is unqualified. The cost of aluminum profiles doped with a large amount of miscellaneous aluminum and waste aluminum is greatly reduced, but it will lead to the unqualified chemical composition of building aluminum profiles and seriously endanger the safety of construction projects.

2. Inferior aluminum profiles greatly reduce the closing time, reduce the loss of chemical reagents, and reduce the cost, but the corrosion resistance of the profiles is also greatly reduced.

3. The thickness of the oxide film is thin. The national standard stipulates that the thickness of the aluminum oxide film of the building should not be less than 10um (micrometer). If the thickness is not enough, the surface of the aluminum profile is easy to rust and corrode. In the random inspection, some aluminum profiles without production name, site, production license, and certification have an oxide film thickness of only 2 to 4um, and some do not even have an oxide film. According to expert estimates, for every 1um reduction in oxide film thickness, each ton of profile can reduce the cost of electricity consumption by more than 150 yuan.

4. The chemical composition is unqualified. Aluminum profiles mixed with a large amount of miscellaneous aluminum and scrap aluminum can greatly reduce the cost, but it will lead to unsatisfactory chemical composition of building aluminum profiles, which seriously endangers the safety of construction projects.

Unqualified aluminum profiles, when used, will be deformed by air, rain, sunlight, etc., causing aluminum profiles to deform, even causing glass breakage and shedding.