Developing versatile, scalable, and durable coatings that repel various matters in different service environment is very important for engineered materials applications, yet remains great challenging. Here, the mesoporous silica microspheres (HMS) fabricated by hard template method were used as micro-nanocontainers to encapsulate the hydrophobic agent of perfluorooctyltriethoxysilane (F13) and corrosion inhibitor of benzotriazole (BTA), forming the functional microsphere of F-HMS(BTA). Moreover, the synthesized organosilane-modified silica sol adhesive (SMP) and F-HMS(BTA) were further used as the binder and functional filler to construct superhydrophobic self-healing coating of SMP@F-HMS(BTA) on various engineering metals through scalable spraying. The prepared coating exhibits good mechanical durability and strong resistance to accretion of multiphase substances including large molecule compounds, liquids, ice crystals, showing good antifouling and anti-icing property. Moreover, the coatings performed hydrophobic and anti-corrosion self-healing property owing to the self-migration release of the functional additives in the micro-nanocontainers, showing "active-passive" synergistic protective mechanism. At a frequency of 0.01 Hz, the charge transfer resistance R_ct and the constant phase element C_cpe were measured to be 2.62×10⁹ Ω cm² and 9.63×10^-10 F cm², respectively. In addition, the corrosion current density was reduced by 3-5 orders of magnitude, indicating superior corrosion resistance. This work provides a feasible strategy to prepare the functional protective coatings for a wide range of applications in addressing the adhesion and corrosion issues.
 

Superhydrophobicity,Self-healing,Corrosion inhibitor,Anticorrosion,Anti-icing