1. It is necessary to see if the alloy aluminum plate has obvious distortion, whether the surface is smooth and flat, whether there are cracks or discs, scratches, burrs, if it is found, it is best not to buy.
2, it is necessary to carefully check whether the surface color of the alloy aluminum plate has different shades of color, and the color difference means that the quality is not enough. Of course, it is also possible to put together the same type of profiles for comparison. Of course, if the color difference is too obvious, it is best not to buy. Check that the section thickness of the alloy aluminum plate is the same as that of the model number.
3. You can use a smooth hard object to scratch the surface of the alloy aluminum plate, leaving a white scratch. The alloy aluminum plate is gently wiped and observed by hand. If it cannot be wiped off, the material may have quality problems, but if It can be easily wiped off, indicating that the thickness of the oxide film on the surface of the profile is acceptable.
For the mechanical frame alloy aluminum plate with poor quality on the market, consumers can use a simple method to identify the alloy aluminum plate, so that you can use it better.