Construction of Superhydrophobic Interface and Anticorrosion Mechanism of Basalt Flake/Fluorinated‐Epoxy‐Acrylic Composite Coating

ABSTRACT This study addresses the issue of structural defects that often occur during the curing process of epoxy resin‐based anti‐corrosion coatings, which can compromise their barrier properties. A dual modification strategy of “resin matrix functionalization + filler interface engineering” is proposed. By synthesizing fluorinated acrylic resin and blending it with epoxy resin, the matrix is endowed with intrinsic hydrophobicity. Simultaneously, the surface of basalt flakes is graft‐modified using KH550 silane coupling agent and stearoyl chloride to construct a stable superhydrophobic interface. This synergistic system combines the physical shielding effect of basalt flakes with the low surface energy characteristics of fluorocarbon chains, forming a multi‐scale barrier structure. Through systematic characterization using SEM, FTIR, electrochemical impedance spectroscopy, salt spray testing, contact angle measurements, and bacterial adhesion experiments, significant improvements in the coating's corrosion resistance, superhydrophobicity, and anti‐fouling properties are validated.