Advantages and disadvantages of aluminum guardrail profiles

By visual inspection, conclusions about the quality can also be drawn, mainly examining the following aspects:
(1) Firstly, check the wall thickness of the profile. If it is indeed a thin-walled profile, it cannot be used.
(2) Check the flatness of the surface of the profile, such as hollow profiles, to see if there are any depressions or bulges on all four sides.
(3) Check if there is any obvious twisting on a 6-meter long profile. If the twisting is too large, it cannot be used because when casting aluminum windows, the profile needs to be straightened, which will always result in the original twisting stress inside the window.
(4) Check for open bubbles (white dots) and ash residue (black dots) on the surface of the profile.
(5) The surface of the profile shall not have cracks, burrs, peeling, or corrosion.
(6) The surface of the profile is not allowed to have obvious scratches, dents, or bumps.
(7) The profile can be bent with both hands, with good twisting strength, and can be restored after release. It cannot be too soft, and it must not be used in a noodle like shape.
(8) Two colors of different shades are not allowed on the same profile.
(9) Put several profiles together and observe their color difference. If the color difference is significant, it may not be easy to use.
(10) On the surface of the profile, use a smooth hard object (iron object) and lightly scratch it. Leave a white scratch on the surface of the profile. If it can be wiped off by hand, it means that the oxide film has not been wiped off. If the white scratch cannot be wiped off by hand and the oxide film has been scratched off, it means that the firmness of the oxide film is poor, the oxide film is too thin, and the quality of aluminum oxidation is poor.
The quality of aluminum is related to many factors. The above is a very simple and popular introduction, mainly to provide users with a preliminary basis for selecting aluminum materials. Don't be fooled. When purchasing materials, it is important to refer to the inspection report. Listening to salespeople's empty promises and seeking cheap prices can easily lead to the repurchase of substandard aluminum materials, causing hidden dangers to the building.
(11) The hollow profile has blue, blue, and yellow walls at the center of the hole All belong to scrap aluminum