A simple method to prepare superamphiphobic aluminum surface with excellent stability

Abstract

Abstract A superamphiphobic aluminum surface was successfully prepared by a simple and environmental method with hot ammonia solution etching and subsequent fluorosilane modification. The hierarchical triangular prism arrays-on-nanoplatelets morphology, when combined with the low surface energy material on the aluminum surface, could help the surface obtain excellent repellence toward a wide range of liquids with the surface tension of 25.7–72.1 mN m −1 . The processing conditions including reaction time and ammonia concentration were investigated to determine their effects on wettability. The obtained superamphiphobic aluminum surface was demonstrated to possess excellent chemical stability. The evaluation results indicated that the superamphiphobic surface had fascinating chemical stability, which could withstand corrosive liquids (HCl/NaOH solutions, 25 °C), hot water (30–100 °C), solvent immersion, high temperature, and long-term period. The as-prepared superamphiphobic surface was also proven to be endued good corrosion resistance. This work provides a simple, economic, environmental, and efficient way to prepare superamphiphobic aluminum surface with excellent chemical stability.