Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments

Chao Yang; Chenyu Wang; Xuanzi Zhao; Zhao Shen; Min Wen; ChaoChao Zhao; Liyuan Sheng; Yaoguang Wang; Daokui Xu; Yufeng Zheng; Paul K. Chu; Xiaoqin Zeng

doi:10.1016/j.matdes.2024.112769

Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments

Chao Yang, Chenyu Wang, Xuanzi Zhao, Zhao Shen^*, Min Wen, ChaoChao Zhao, Liyuan Sheng^*, Yaoguang Wang, Daokui Xu, Yufeng Zheng, Paul K. Chu, Xiaoqin Zeng^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

39 Citations (Scopus)

14 Downloads (CityUHK Scholars)

Abstract

Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications. © 2024 The Authors

Original language	English
Article number	112769
Journal	Materials and Design
Volume	239
Online published	17 Feb 2024
DOIs	https://doi.org/10.1016/j.matdes.2024.112769
Publication status	Published - Mar 2024

Funding

This work was supported by the National Natural Science Foundation of China (52127801 and 22205012), National funded postdoctoral researcher program (GZC20231545), China Postdoctoral Science Foundation (2023M742224), Shenzhen Basic Research Project (JCYJ20200109144608205 and JCYJ20210324120001003), Guangdong Basic and Applied Basic Research Foundation (2020A1515011301 and 2021A1515012246), IER foundation (IERF202102, IERF202201, IERF202202, and IERF202103), City University of Hong Kong Donation Research Grants (DON-RMG 9229021 and 9220061), and City University of Hong Kong Strategic Research Grant (SRG No. 7005505)

Research Keywords

Corrosion resistance
MAO-based composite coating
Superhydrophobic layer
Zinc phosphate nanoflowers

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This full text is made available under CC-BY-NC 4.0. https://creativecommons.org/licenses/by-nc/4.0/

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Yang, C., Wang, C., Zhao, X., Shen, Z., Wen, M., Zhao, C., Sheng, L., Wang, Y., Xu, D., Zheng, Y., Chu, P. K., & Zeng, X. (2024). Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments. Materials and Design, 239, Article 112769. https://doi.org/10.1016/j.matdes.2024.112769

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title = "Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments",

abstract = "Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications. {\textcopyright} 2024 The Authors",

keywords = "Corrosion resistance, MAO-based composite coating, Superhydrophobic layer, Zinc phosphate nanoflowers",

author = "Chao Yang and Chenyu Wang and Xuanzi Zhao and Zhao Shen and Min Wen and ChaoChao Zhao and Liyuan Sheng and Yaoguang Wang and Daokui Xu and Yufeng Zheng and Chu, {Paul K.} and Xiaoqin Zeng",

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doi = "10.1016/j.matdes.2024.112769",

language = "English",

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Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments. / Yang, Chao; Wang, Chenyu; Zhao, Xuanzi et al.
In: Materials and Design, Vol. 239, 112769, 03.2024.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments

AU - Yang, Chao

AU - Wang, Chenyu

AU - Zhao, Xuanzi

AU - Shen, Zhao

AU - Wen, Min

AU - Zhao, ChaoChao

AU - Sheng, Liyuan

AU - Wang, Yaoguang

AU - Xu, Daokui

AU - Zheng, Yufeng

AU - Chu, Paul K.

AU - Zeng, Xiaoqin

PY - 2024/3

Y1 - 2024/3

N2 - Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications. © 2024 The Authors

AB - Corrosion caused by the active chemical properties of magnesium (Mg) alloys seriously restricts their applications in aerospace, transportation, biomedicine, and other fields. Although micro-arc oxidation (MAO) coatings can provide some corrosion protection for Mg alloys, their microporous structure is prone to localized corrosion. Herein, nanoflower-shaped zinc phosphate is prepared and hydrophobically modified. The commercial glue is used to bond the nanoflower-shaped zinc phosphate particle arrays to the MAO-coated AZ31B alloy substrate to produce a two-layer composite coating with superhydrophobic properties. The composite coating exhibits obvious repulsive effects in salt and acidic solutions as indicated by contact angles of 160° and 156°, respectively. The composite coating has improved electrochemical properties and immersion corrosion in both the salt and acidic solutions compared to the substrate and MAO-coated sample. Moreover, the composite coating retains the long-term superhydrophobic effects under different conditions such as immersion in salt and acidic solutions, water scouring, and sunlight exposure, which well indicates commercial applications. © 2024 The Authors

KW - Corrosion resistance

KW - MAO-based composite coating

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Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments

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Superhydrophobic surface on MAO-processed AZ31B alloy with zinc phosphate nanoflower arrays for excellent corrosion resistance in salt and acidic environments

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

DON: Surface Modification and Fabrication of Advanced Materials

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