Scientific Development Research

as the heart of the hydraulic brake system, the master cylinder is a very important safety part. Anodizing is to increase its wear resistance and corrosion resistance. However, improper and uncontrolled anodizing process will lead to serious consequences such as oil leakage. Excessive acid and alkali in each process link may corrode the base material of the master cylinder and affect the formation and quality of the oxide film. Conductivity and cleaning are important control details of oxide film formation. The oxidation parameters such as current, sulfuric acid concentration and aluminum ion content will have an important impact on the thickness and roughness of the film, and the thickness and roughness of the film are important quality indicators of the anodic oxidation process. Therefore, it is of great significance to study the influencing factors in the anodic oxidation process for developing a stable oxidation process.

corrosion, film thickness, roughness