Investigation of the run-in and corrosion behavior of a PEO-coated aluminum brake disc

Plasma electrolytic oxidation (PEO) is a relatively new electrochemical surface treatment process for the generation of oxide coatings on metals such as Aluminum or Magnesium. Most of the papers, referring to the PEO process, were published in the eighties of the previous century [2, 3]. Nowadays, the process is used for a wide range of applications in various industrial fields [4]. In plasma electrolytic oxidation higher voltages are applied than in the anodizing process.