Phys.org October 18, 2022
Fragile hierarchical structures, fluorine-containing chemicals usage, and strict requirements for substrate scopes in biomimetic superhydrophobic coating remain thorny challenges. Researchers in China constructed a mechanical robust superhydrophobic ZnO@STA@PDMS coating with fluorine-free reagents through wide-applicable and substrate-independent spray-coating method. Different analyses and contact angle meter were used to assess the surface micro-nano structures, chemical compositions, thermal stability, and wettability variations. The corrosion resistance of the coating was reduced by two orders of magnitude after being spray-coated with superhydrophobic ZnO@STA@PDMS indicating excellent corrosion resistance in marine submerged zone. In simulated marine atmospheric conditions with high relative humidity, the salt-deliquesce behaviors of single and double NaCl particles on bare and coated carbon steel surfaces were recorded. In a high humidity atmospheric environment, the instantaneous salt-deliquesce self-coalescence phenomena provided a new type of anti-corrosion mechanism. The new coating could withstand more than 30 tape-peeling cycles and 400 cm abrasion distance, demonstrating good mechanical stability in prospective real-world applications…read more. Open Access TECHNICAL ARTICLEÂ
Graphical abstract: Credit: Materials & Design, Volume 223, November 2022, 111246Â