Special finishes are applied to threaded fasteners to prevent corrosion or enhance appearance.
Coatings provide multiple barriers to corrosion. Coatings are typically applied using the dip-spin process. A mesh basket filled with fasteners is immersed in the coating slurry. It is then removed and spun to eliminate excess coating. Afterward, the fasteners are put through a baking oven to cure the coating. This process is someArial repeated between two and four Arial to build up the required coating thickness.