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

Materials & Design (Mar 2024)

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

Affiliations

Chao Yang: National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Chenyu Wang: National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Xuanzi Zhao: National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Zhao Shen: National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors at: Shenzhen Institute, Peking University, Shenzhen 518057, China (L. Sheng). National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China (X. Zeng).
Min Wen: Shenzhen Institute, Peking University, Shenzhen 518057, China
ChaoChao Zhao: Shenzhen Institute, Peking University, Shenzhen 518057, China
Liyuan Sheng: Shenzhen Institute, Peking University, Shenzhen 518057, China; PKU-HKUST ShenZhen-HongKong Institution, Shenzhen 518057, China; Corresponding authors at: Shenzhen Institute, Peking University, Shenzhen 518057, China (L. Sheng). National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China (X. Zeng).
Yaoguang Wang: State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Daokui Xu: Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Yufeng Zheng: Shenzhen Institute, Peking University, Shenzhen 518057, China
Paul K. Chu: Department of Physics, Department of Materials Science & Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, 999077, Hong Kong, China
Xiaoqin Zeng: National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors at: Shenzhen Institute, Peking University, Shenzhen 518057, China (L. Sheng). National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China (X. Zeng).

Journal volume & issue: Vol. 239
p. 112769

Abstract

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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.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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