The aluminum alloy profile is coated with fluorocarbon paint, and its abrasion resistance test can use the falling sand test method. The principle is also relatively simple. The standard sand stipulated in GB178 is mainly dropped freely from a specified height through a conduit to scour the surface paint film of the tested part until the paint film on the profile is worn until the substrate is exposed. The wear resistance of fluorocarbon paint is evaluated by the standard amount of sand consumed per unit paint film thickness.
A few points to note are that you should pay attention to shelter from the wind during the falling sand test, otherwise the free fall of the standard sand will be impossible to talk about, and the test environment will also be destroyed. The steps of the test can refer to the regulations in GB/T5237.5, so I won’t repeat them here.
The falling sand Tester is mainly composed of a funnel carrying standard sand and a conduit. The internal diameter of the conduit is Ф19mm and the length of the conduit is 914mm. The relevant pictures, videos, operating instructions and parameters of the falling sand Tester can be found in Beichao.
