Industry News

Metal finishing plays an improtant role in the production processes, especially for the material of iron. In order to produce a perfect produce with nice surface treatment, the suitable finishing is necessary. Now let's introduce several kinds of metal finishing as below:

1. Such as grinding, roughing and rough grinding, the first kind of finishing is coarse in nature and usually it is a preliminary finish applied before manufacturing. It is coarse in appearance and applied by using 36–100 grit abrasive. And when the finish is specified as this kind, the material is polished to uniform 60-80 grit.

2. The second kind goes to architectural finish, which is characterized by fine polishing grit lines that are uniform and directional in appearance. It is produced by polishing the metal with a 120-180 grit belt or wheel finish and then softened with an 80-120 grit greaseless compound or a medium non woven abrasive belt or pad. And this kind of finishing also called brushed, directional or satin finish.

3. The third one is dairy or sanitary finish which is commonly used for the medical and food industry and usually used on stainless steel. This finish is much finer than architectural finish. This finish enhances the physical appearance of the metal as well as increases the sanitary benefits. One takes great care to remove any surface defects in the metal, like pits, that could allow bacteria to grow.

4. The fourth one goes to fine satin finish, which is produced by polishing with a 220-280 grit belt or very fine non woven abrasive belt or pad. Polishing lines will be soft and less reflective than architectural finish.

5. The next kind is produced by polishing with a 280-320 belt or wheel and sisal buffing with a cut and color compound. This is a semi-bright finish that will still have some polishing lines but they will be very dull. This is commonly applied to keep polishing costs down when a part needs to be shiny but not flawless.

6. The last one goes to mirror finish. This finish is produced by polishing with at least a 320 grit belt or wheel finish. Care will be taken in making sure all surface defects are removed. The quality of this finish is dependent on the quality of the metal being polished. Some alloys of steel and aluminum cannot be brought to a mirror finish.