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

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

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 (US)
JournalSurface and Coatings Technology
Volume408
DOIs
StatePublished - Feb 25 2021
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • General Chemistry
  • Surfaces and Interfaces
  • Condensed Matter Physics

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