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

doi:10.1016/j.surfcoat.2020.126809

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

Mechanical and Construction Engineering Department

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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 language	English
Article number	126809
Number of pages	7
Journal	Surface and Coatings Technology
Volume	408
Early online date	6 Jan 2021
DOIs	https://doi.org/10.1016/j.surfcoat.2020.126809
Publication status	Published - 25 Feb 2021

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10.1016/j.surfcoat.2020.126809

MS_Surface_Coat_Tech_R3_HighlightedAccepted author manuscript, 1.55 MBLicence: CC BY-NC-ND

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title = "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 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.",

author = "Zhehui Zhang and Sreepathy Sridhar and Guoying Wei and Yundan Yu and Zhongquan Zhang and Li Jiang and Yumeng Yang and Shahzad, {Muhammad Wakil} and Xue Chen and Xu, {Ben Bin}",

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T1 - A Highly Controlled Fabrication of Porous Anodic Aluminium Oxide Surface with Versatile Features by Spatial Thermo-anodization

AU - Zhang, Zhehui

AU - Sridhar, Sreepathy

AU - Wei, Guoying

AU - Yu, Yundan

AU - Zhang, Zhongquan

AU - Jiang, Li

AU - Yang, Yumeng

AU - Shahzad, Muhammad Wakil

AU - Chen, Xue

AU - Xu, Ben Bin

PY - 2021/2/25

Y1 - 2021/2/25

N2 - 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.

AB - 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.

U2 - 10.1016/j.surfcoat.2020.126809

DO - 10.1016/j.surfcoat.2020.126809

M3 - Article

SN - 0257-8972

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JF - Surface and Coatings Technology

M1 - 126809

ER -

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

Abstract

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