It is a chemical surface preparation process applied to aluminum and its alloys. Chromate (Alodin) Coating, which can be applied under paint, provides a suitable environment for powder and wet paint applied to aluminum, and contributes to the adhesion of the paint to the surface. This process successfully passes the 100 0 hour salt fog test. We have varieties such as yellow chromate, green chromate, transparent chromate and chrome-free chromate. The sectors in which this process is generally applied are aerospace, military materials and coating of decorative aluminum parts.