A Robust Biomimetic Superhydrophobic Coating with Superior Mechanical Durability and Chemical Stability for Inner Pipeline Protection

Abstract

Durable superhydrophobic anti‐erosion/anticorrosion coatings are highly demanded across various applications. However, achieving coatings with exceptional superhydrophobicity, mechanical strength, and corrosion resistance remains a grand challenge. Herein, a robust microstructure coating, inspired by the cylindrical structures situated on the surface of conch shell, for mitigating erosion and corrosion damages in gas transportation pipelines is reported. Specifically, citric acid monohydrate as a pore‐forming agent is leveraged to create a porous structure between layers, effectively buffering the impact on the surface. As a result, the coating demonstrates remarkable wear resistance and water repellency. Importantly, even after abrasion by sandpaper and an erosion loop test, the resulting superhydrophobic surfaces retain the water repellency. The design strategy offers a promising route to manufacturing multifunctional materials with desired features and structural complexities, thereby enabling effective self‐cleaning and antifouling abilities in harsh operating environments for an array of applications, including self‐cleaning windows, antifouling coatings for medical devices, and anti‐erosion/anticorrosion protection, among other areas.

White Roman Goose Feather-Inspired Unidirectionally Inclined Conical Structure Arrays for Switchable Anisotropic Self-Cleaning

“…It is noteworthy that the mechanical robustness is competitive with commercial coatings. 54 In this study, the thermal stability of the coating is evaluated, as well. The surface-modified structure arraycovered substrates are incubated at varied temperatures ranging from 25 to 150 °C for 24 h, followed by assessing the resulting static water contact angle and water contact angle hysteresis.…”

“…In comparison, the antiwetting performance is diminished after scratching with a 4H pencil. It is noteworthy that the mechanical robustness is competitive with commercial coatings . In this study, the thermal stability of the coating is evaluated, as well.…”

Superhydrophobic Surfaces Prepared from Columnar Units by Convenient Electrodeposition with Excellent Mechanical Stability Impact and Corrosion Resistance

“…The structure was constructed on both rigid and flexible substrates and demonstrated high resistance to various organic solvents and water. Zang et al 17 used 3D printing to construct a columnar array structure that achieved superhydrophobicity through nanoscale TiO 2 and carbon nanotubes. They also enhanced the impact resistance of the coating by using a porous polydimethylsiloxane sponge as a buffer layer.…”

Designing a Robust Ni–P/CeO2 Superhydrophobic Composite Coating for Synergistically Enhanced Corrosion Protection and Friction Reduction Performance

“…5,6 However, the poor mechanical stability limits their applications. 7 Meanwhile, corrosive media penetrate the coating during the soaking process, resulting in longterm protection failures. 8,9 Therefore, the design and construction of a novel superhydrophobic coating with high mechanical robustness and anticorrosion performance is an effective strategy.…”

“…Metal corrosion is not only a major economic burden, it also leads to serious safety accidents. , Protective coating technology is proven to be one of the most effective and widely used methods of protecting metals from corrosion. , Superhydrophobic coatings have received considerable attention in the field of corrosion protection due to their unique water repellency. , However, the poor mechanical stability limits their applications . Meanwhile, corrosive media penetrate the coating during the soaking process, resulting in long-term protection failures. , Therefore, the design and construction of a novel superhydrophobic coating with high mechanical robustness and anticorrosion performance is an effective strategy.…”