Anodizing is an electrochemical process that converts the surface of a metallic job into a protective metal oxide film. The process is carried out in a electrolytic cell where a job is made of an anode and an inert metal as a cathode. After applications, mechanisms and morphology of anoding in the July issue of Galvanotechnik, this part focuses on anodizing in aqueous, organic and deep eutectic solvents.