The Use of Hangers in Anodic Oxidation of Aluminum and Aluminum Alloys
ã€China Aluminum Industry Network】1 Anodized parts can be mounted on universal racks or special racks according to their appearance and size.
2 Before mounting, the hanger must be alkali-etched or boring to remove the old oxide film on the surface of the hanger.
3 When mounting, it is necessary to hold the card securely, but it is not possible to pinch the parts, especially if the threaded parts are machined.
The 4 large skins are attached with medium-sized hangers and the bolts are tightly tightened to prevent them from falling off when they oscillate up and down in the solution.
5 box-shaped parts, tubular parts and machined parts with blind holes must make the parts of the hole, mouth up, so that the gas generated when the anodizing can be freely excluded, otherwise it will form air bags, so that there is no oxide film on the local surface .
6 Aluminum rivets, washers and other small parts can be mounted in rivet baskets for anodization. Before the basket is installed, the rivets are etched and lighted, cleaned, and then put on the basket. When oxidizing, in order to increase the conductive contact and reduce the amount of rework, some aluminum chips (about 10% to 20% of the rivet volume) can be added to the basket when the rivet is placed in the basket, and mixed with rivets and washers. After filling, add a cap and fasten it with an aluminum nut. You can shake it for a while and listen for loose sounds. If there is a loud noise, you should tighten it again, but do not overtighten it. The parts made of the same material as the anti-slip aluminum plate 7 should be mounted on a rack, and it is not allowed to have one rack mounted with two kinds of materials.
8 Anodized parts, if partial or whole surface does not allow fixtures to be printed, there should be a process margin for card mounting.
9 Keep a certain distance between each fixture to avoid 6061 aluminum parts and parts colliding. There must be a certain gap between the parts and the cathode. Check the cathodes with aluminum rods before applying power.
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