A highly controlled fabrication of porous anodic aluminium oxide surface with versatile features by spatial thermo-anodization

Abstract Thermo-anodization technology has been considered as an effective means to improve the thermal, physical and chemical properties for metal alloy. In this work, we achieve a porous black layer on surface of aluminium alloy through environmentally friendly anodic oxidation process, with high thermal emittance (0.96) solar absorptivity (0.921). addition, thermo-anodized coating shows unique anti-corrosion property under UV irradiation. A hybrid hydrophobic facilitated treating silane. Moreover, anti-icing feature can be realised that effectively delay freezing water droplet AA2024 As such, specific process provides simple method improving infrared alloys, enabling broad applications in aerospace engineering.