Effect of Preliminary Aluminum Annealing on the Microstructure of Anodized Aluminum Oxide Films

The article focuses on the technology of preliminary preparation of the aluminum foil surface with a thickness of 50 μm and the actual process of electrochemical anodizing. The research stage was the restructuring of the foil surface during thermal annealing. It was found that homogenization annealing increases the uniformity of the structure and chemical composition of the material. The morphology and crystal structure of the anodized oxide were examined by transmission electron microscopy. The effect of heat-treatment before aluminum foil anodization on the microstructure of anodized aluminum oxide films has been found.