ملامح لمحات الألومنيوم السفلية:

1. التركيب الكيميائي غير مؤهل. يتم تقليل تكلفة مقاطع الألمنيوم المخدرة بكمية كبيرة من الألمنيوم المتنوع وخردة الألمنيوم في المنتج بشكل كبير, ولكنه سيؤدي إلى تشكيلات غير مؤهلة من الألمنيوم للمباني ويعرض بشكل خطير استقرار مشاريع البناء.

2. تقلل مقاطع الألمنيوم السفلية بشكل كبير من وقت الختم, reduce the loss of chemical reagents, and reduce the cost, but the corrosion resistance of the profiles is also greatly reduced.

3. Thin oxide film thickness. The standard stipulates that the oxide film thickness of architectural aluminum profiles should not be less than 10um (micrometers). 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, factory location, production license, and qualification certificate have an oxide film thickness of only 2 to 4um, and some do not even have an oxide film. According to expert estimates, every 1um reduction in oxide film thickness can reduce power consumption costs by more than 150 yuan per T profile.

4. التركيب الكيميائي غير مؤهل. The aluminum profile mixed with a large amount of miscellaneous aluminum and scrap aluminum can greatly reduce the cost, but it will cause the chemical composition of the building aluminum profile to be unqualified, and seriously endanger the stability of the construction project.

Unqualified aluminum profiles may be deformed due to the influence of air, rain, sunlight, إلخ., and even cause glass breakage and fall off.