No abstract

In the present work, the robustness of an anodizing process was tested. Important anodizing parameters such as the anodizing potential, the dwell time at the anodizing potential, and the bath temp. were varied. The influence of the parameter variation on the microstructure of the oxide layers was investigated by SEM. It could be shown that the pore diam. as well as the layer thickness reacts very sensitively on the alternating parameters. The barrier layer thickness clearly depends on the anodizing voltage but is independent on the dwell time

No abstract

No abstract

No abstract

No abstract

No abstract

The present study investigates the interplay between ongoing bath aging during the anodizing process and the formation and properties of the anodic formed oxide layers on AA 1050 in sulfuric acid. The change in the bath over the time of use is studied by controlling the conductivity of the bath. The pH value and the concentration of Al3+ ions in the bath are simultaneously measured. The kinetic of the oxide formation depending on the bath aging is electrochemically investigated by repetitive potential controlled anodizing of reference samples. Supplementary material diagnostics by SEM and infrared reflection–absorption spectroscopy show a significant decrease of the oxide film thickness as well as the molecular composition with ongoing bath aging.