Abstract
Hydrophobic films were produced on a copper surface by chemical methods. The whole process consisted of three stages. Initially the hierarchical structure of the surface was achieved by in situ reduction of Ag+ ions to Ag using silver nitrate solution, thereby creating a nanostructured surface. The copper surface was then coated with polydopamine by a simple immersion procedure. Finally, it was decorated with thiols, to achieve a hydrophobic surface. The wetting angle was used to evaluate the hydrophobicity of the produced surfaces. The anti-corrosion behavior of the produced hydrophobic films, were evaluated on the specimens that showed higher hydrophobicity by electrochemical methods. Electrochemical techniques (potentiodynamic polarization and resistance spectroscopy tests) were performed in 3.5% NaCl solution. Morphology was investigated by scanning electron microscopy (SEM). All experimental results showed a clear improvement in the corrosion behavior of the hydrophobic copper surfaces while the hydrophobicity was maintained after the corrosion tests.
Highlights
In recent years a plethora of metallic surfaces with special wetting ability have been manufactured through a combination of surface micro- and nanostructures and specific chemical composition, inspired by structures that exhibit materials of nature
When the CA is between 90◦ and 150◦, the surface is described as a hydrophobic surface and for contact angles more than 150◦, the surface is superhydrophobic
The hydrophobicity remains after 60 minutes and the contact angle remains almost constant at about 122°
Summary
In recent years a plethora of metallic surfaces with special wetting ability have been manufactured through a combination of surface micro- and nanostructures and specific chemical composition, inspired by structures that exhibit materials of nature. Some of the mostly known water-repellent natural surfaces, are the lotus leaf, the shark skin and the skin of some insects. These metal surfaces with tailored wettability, are used in significant applications in corrosion protection systems, such as organic-water separation, fluid transport, self cleaning and anti-icing surfaces. The wettability could be characterized by the contact angle (CA), between the surface and the droplet. When the CA is between 90◦ and 150◦, the surface is described as a hydrophobic surface and for contact angles more than 150◦, the surface is superhydrophobic. The wetting state can be described by the Wenzel and Cassie–Baxter models
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
