Ezazi Mohammadamin, Shrestha Bishwash, Klein Nathan, Lee Duck Hyun, Seo Sungbaek, Kwon Gibum
Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States.
Green Materials and Processes Group , Korea Institute of Industrial Technology , Ulsan 44413 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Aug 21;11(33):30240-30246. doi: 10.1021/acsami.9b08855. Epub 2019 Aug 6.
Corrosion-protective surfaces are of the utmost relevance to ensure long-term stability and reliability of metals and alloys by limiting their interactions with corrosive species, such as water and ions. However, their practical applications are often limited either by the inability to repel low surface tension liquids such as oils and alcohols or by poor mechanical durability. Here, a superomniphobic surface is reported that can display very high contact angles for both high and low surface tension liquids as well as for concentrated acids and bases. Such extreme repellency allowed for approximately 20% of the corrosion rate compared to the conventional superhydrophobic corrosion protective coatings. Furthermore, the superomniphobic surface can autonomously repair mechanical damage at an elevated temperature (60 °C) within a short period of time (60 s), and the surface can restore its intrinsic corrosion protection performance. Such superomniphobic surfaces thus offer a wide range of potential applications, including pipelines, with sustainable corrosion protection and rust inhibitors for steel in reinforced concrete.
防腐蚀表面对于通过限制金属和合金与腐蚀性物质（如水和离子）的相互作用来确保其长期稳定性和可靠性至关重要。然而，它们的实际应用往往受到限制，要么无法排斥低表面张力液体（如油和醇），要么机械耐久性差。在此，报道了一种超疏液表面，它对高、低表面张力液体以及浓酸和碱都能表现出非常高的接触角。与传统的超疏水防腐蚀涂层相比，这种极端的排斥性使腐蚀速率降低了约20%。此外，超疏液表面能够在高温（60°C）下在短时间内（60秒）自主修复机械损伤，并且表面能够恢复其固有的防腐蚀性能。因此，这种超疏液表面具有广泛的潜在应用，包括管道，为钢筋混凝土中的钢材提供可持续的防腐蚀保护和防锈剂。
