Surface Protection by Ion Plated Coatings, Part 2

With ion plated aluminium films, the film acted as the anode of the cell and was subject to chemical dissolution. The corrosion rates in NaCl, however, were comparatively lower than those detected for bulk aluminium. Figs. 8 and 9 show scanning electron micrographs for surface texture of a coated couple in comparison with the surface texture of uncoated couples.