1. Identification inspection
Whether the product standard code and production license number are marked on the aluminum profile and packaging.
2. Surface quality
In addition to being clean, the surface of the aluminum profile should not be allowed to have defects such as cracks, peeling, corrosion and bubbles, but also defects such as corrosion spots, electrical burns, black spots, and oxide film peeling.
3. Oxide film thickness
The oxide film of the aluminum profile is formed in anodizing, which has the function of protection and decoration, and can be detected by an eddy current thickness gauge.
4. Sealing quality
There are many voids on the surface of the aluminum profile after anodization. If it is not sealed or not well sealed, the corrosion resistance of the aluminum profile will be reduced. The commonly used methods for sealing quality inspection are acid leaching method, admittance method and phosphobutyric acid method.
The acid leaching method is generally used in the on-site inspection, that is, the surface of the aluminum profile is scrubbed with acetone to remove oil and dust, and nitric acid with a volume ratio of 50% is dropped onto the surface and gently scrubbed. After 1 minute, the nitric acid is washed with water, and then wipe Dry, drop a drop of medical purple syrup on the surface, after 1 minute, wipe off the purple syrup and thoroughly clean the surface, carefully observe the traces left, the aluminum profile with poor sealing will leave obvious traces, and the heavier the traces, the better the sealing quality. the worse.
Post time: Nov-24-2022
