Screws deal with the cleanest way to clean, pickling, sandpaper grinding, sandblasting, heat treatment.

1, cleaning: soak the screws in a cleaning agent, and then gently brush them with a brush. This method is suitable for screws that need to remove surface dirt and grease.

2, acid washing: soak the screws in dilute acid for a period of time, and then rinse with water. This method is suitable for removing rust, oxidation and other chemical dirt screws.

3, sandpaper sanding: use fine sandpaper to gently sand the surface of the screws until the surface becomes smooth. This method is suitable for occasions where you need to make the surface of the screw smoother.

4, sandblasting: screws into the sandblasting machine, with a high-speed air jet sand, until the surface becomes smooth. This method is suitable for screws that need to remove surface coatings and paints.

5, heat treatment: screws will be heated to a certain temperature, and then quickly cooled. This method will change the hardness and strength of the screws.