Influence of anodization parameters on film thickness and volume expansion of thick- and large-sized anodic aluminum oxide film

Anodic aluminum oxide (AAO) film with a thickness ranging from 20 to 100 μm was prepared using large-sized Al plate (4 cm × 10 cm) investigate the anodization parameter effect on and volume expansion factor. A corrosion treatment (voltage = 0 V) performed dissolution caused by acid. The actual anode surface temperature also measured confirm field-assisted nature of AAO dissolution. increases exponentially temperature, approximately linearly voltage, duration or concentration. factor gives first rising then falling trend duration, while it has nearly linear voltage intensified electric field, its decrease is attributed Joule heat-enhanced In case large (> μm), pore confinement may be one reasons for change addition conventional parameters, heat transfer-related parameters (for example, sample size) greatly affect growth.