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<p>Aluminum alloy is a crucial lightweight engineering material, but its performance in harsh environments is often limited by icing and corrosion. Superhydrophobic coatings offer a promising solution, yet poor durability and complex preparation hinder practical application. Herein, we address these challenges via an effective spraying strategy to construct a multifunctional integrated superhydrophobic coating on aluminum alloy. The coating combines a robust polymer matrix—comprising cross-linked epoxy resin and polydimethylsiloxane—with hydrophobically modified silica, creating a stable rough surface with low surface energy on the aluminum alloy substrate. The coating exhibits good superhydrophobic properties (with a contact angle of 153.1° ± 1.2° and a rolling angle of 6.6° ± 0.8°), appropriate mechanical durability against abrasion and peeling, high chemical stability in extreme conditions, and self-cleaning performance against representative contaminants. Electrochemical tests confirm its superior corrosion resistance (76.4% protection efficiency vs. bare Al). Notably, the coated alloy delays droplet freezing to 698&#xa0;s at -10&#xa0;°C and maintains a low ice adhesion strength of 52 ± 6&#xa0;kPa. This work suggests a simple yet promising solution for aluminum alloy protection, integrating superhydrophobicity, durability, corrosion resistance, self-cleaning performance and anti-icing properties into a single coating.</p>

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Construction of a Multifunctional Integrated Superhydrophobic Coating for Protection and Anti-icing of Aluminum Alloy

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Xiao Liang,
  • Ying Wang,
  • Zhao Zhang,
  • Maiyong Zhu,
  • Songjun Li

摘要

Aluminum alloy is a crucial lightweight engineering material, but its performance in harsh environments is often limited by icing and corrosion. Superhydrophobic coatings offer a promising solution, yet poor durability and complex preparation hinder practical application. Herein, we address these challenges via an effective spraying strategy to construct a multifunctional integrated superhydrophobic coating on aluminum alloy. The coating combines a robust polymer matrix—comprising cross-linked epoxy resin and polydimethylsiloxane—with hydrophobically modified silica, creating a stable rough surface with low surface energy on the aluminum alloy substrate. The coating exhibits good superhydrophobic properties (with a contact angle of 153.1° ± 1.2° and a rolling angle of 6.6° ± 0.8°), appropriate mechanical durability against abrasion and peeling, high chemical stability in extreme conditions, and self-cleaning performance against representative contaminants. Electrochemical tests confirm its superior corrosion resistance (76.4% protection efficiency vs. bare Al). Notably, the coated alloy delays droplet freezing to 698 s at -10 °C and maintains a low ice adhesion strength of 52 ± 6 kPa. This work suggests a simple yet promising solution for aluminum alloy protection, integrating superhydrophobicity, durability, corrosion resistance, self-cleaning performance and anti-icing properties into a single coating.