Here is a professional factory talking about cleaning methods of hex bolts. Our factory are selling Zinc Hex Bolts. If you need any product’s information, you can contact us.
1. Remove the oil. The hexagonal bolt will pass through several machines filled with oil during the production process. Therefore, when the screw is finished, there will be oil stain on the surface, so it needs to be cleaned to recover the bolt. When cleaning, pour the stainless steel cleaning degreasing. Wash the liquid at room temperature for 3 to 8 minutes, then rinse with water to dry.
2. Descaling. Some blackened hexagonal bolts produce scale in the production process. It needs to be removed here to restore the bright appearance. It is the same as the degreasing method. Pour the special cleaning agent into the mechanical vibration tank at normal temperature. Clean the bolt mechanical vibration for 2~30 minutes, then filter it again with cleaning.
3. Polishing. Polishing is also a common method for surface treatment of bolts. It requires the use of a machine and a pair of abrasives to grind the surface burrs and bulges of the black hexagonal bolts to make them bright. After polishing, the steps of cleaning are also required. The surface is brighter.