Aluminum test standards
Aluminum test standards
1, aluminum surface quality requirements:
Defect name | Defect scope | Value |
Scratches | depth（mm） | ≤0.010 |
Area does not exceed the percentage of the total area | 5 | |
sunken | Recessed depth（mm） | ≤0.030 |
Missing | depth（mm） | ≤0.010 |
The length is not greater than（mm） | 2 | |
No more than the number allowed on the surface | 2 | |
Distance from die casting edge（mm） | ≥0.1 | |
spacing（mm） | ≥0.2 | |
Reticulate burrs | height（mm） | ≤0.020 |
2, after the aluminum surface treatment inspection standards:
Appearance:
1. Appearance: The surface of the oxidation part should be free of spots, blisters, pinholes, deformation, Different colors, Watermark, Mist, foreign body, Black spots, Rough, Scratches and other defects (allowing slight hanging marks to exist).
2. Characteristic test method:
1) Salt spray test: Both natural oxidation and gold oxidation salt spray tests are required to reach 168 hours (anodic oxidation 240H), and test sample results are evaluated according to QB/T 3832 standard (some companies require 100H for natural oxidation).
2) Adhesion test: Use 3M standard tape to stick. When tape is applied, the tape should be tightly bound to the test area. There should be no bubbles or wrinkles. Pull up after 2-5 minutes. No oxide film is peeled off.
3) RoHS Compliance Requirement: RoHS-compliant products are required for oxidized products; yellow oxidizers cannot yet meet environmental requirements (not universal).
Another: Anodized film thickness requirements: its thickness is 5 ~ 20 microns, hard anodized film up to 60 ~ 200 microns.
