A Highly Controlled Fabrication of Porous Anodic Aluminium Oxide Surface with Versatile Features by Spatial Thermo-anodization

Zhehui Zhang, Sreepathy Sridhar, Guoying Wei, Yundan Yu, Zhongquan Zhang, Li Jiang, Yumeng Yang, Muhammad Wakil Shahzad, Xue Chen, Ben Bin Xu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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 the surface of aluminium alloy through an environmentally friendly anodic oxidation process, with a high thermal emittance (0.96) and a high solar absorptivity (0.921). In addition, the black thermo-anodized coating layer shows a unique anti-corrosion property under UV irradiation. A hybrid hydrophobic surface has been facilitated through treating the thermo-anodized porous layer with silane. Moreover, an anti-icing feature can be realised that can effectively delay the freezing of water droplet on the surface of AA2024 aluminium alloy. As such, the specific anodic process of coating provides a simple method for improving the solar absorptivity and infrared emittance of aluminium alloys, enabling broad applications in aerospace engineering.
Original languageEnglish
Article number126809
Number of pages7
JournalSurface and Coatings Technology
Volume408
Early online date6 Jan 2021
DOIs
Publication statusPublished - 25 Feb 2021

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