Designing Robust Superhydrophobic/Superoleophilic Composite Coatings for Anticorrosion/Scaling by Utilizing 8‐Hydroxyquinoline Microcapsules

Superhydrophobic coatings with excellent water‐repellency are promising for corrosion resistance applications. Herein, a superhydrophobic–superoleophilic composite coating is prepared by combining fluorosilicone resin, microcapsules (MCs), and carbon nanofiber (CNF). Microsized MCs composed of the corrosion inhibitor 8‐Hydroxyquinoline (8‐HQ) as the core and polyurea/polyurethane/SiO 2 as the shell have been synthesized. Then, by incorporating CNF, the water contact angle of the final coating can reach 154 ± 1.6° while the oil contact angle is 0°. Additionally, the superhydrophobic coating demonstrates exceptional corrosion resistance, featuring a minimal corrosion rate of 9.78 × 10 −7 mm year −1 because 8‐HQ can chelate with Fe 3+ to form a passivation layer that prevents the permeation of corrosive media. Furthermore, the superhydrophobic coating exhibits remarkable antiscaling, chemical durability, antifouling, and self‐cleaning properties. It is envisaged that this design strategy will prove to be a promising methodology for practical anticorrosion applications of superhydrophobic coatings.