Density values for anodic films on aluminium and some observations of pore morphology

The technology of anodizing for aluminium is mature at 75 years old and broadly well-understood. Present day development relates largely to improved control of process parameters and exploiting known product properties for new enhanced applications. To attain better control of process and product parameters it is now necessary to understand detailed behaviour and obtain more accurate fundamental data. such are film density and pore characteristics. This presentation will explore some aspects of these two topics, such as: Density, hardness and porosity data Pore formation, evidence, film density values Variation with processing parameters Pore morphology, substrate effects Depth of pore influencing surface layers.