Superhydrophobic Surfaces Based on Nickel Stearate: An Innovative Approach to Coatings on 7050 Aeronautical Aluminum Alloy
| Autor: | Jedaías J. da Silva, Ana L. C. Guimarães, Walter L. C. da Silva Filho, Rafael G. C. da Silva, Maria I. C. Malta, Dayanne D. S. Morais, Severino L. Urtiga Filho, Magda R. S. Vieira |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Materials Research, Vol 27, Iss suppl 1 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1516-1439 1980-5373 |
| DOI: | 10.1590/1980-5373-mr-2023-0562 |
| Popis: | A metallic surface can exhibit low wettability through the formation of a rough structure with micro/nanometric dimensions combined with a surface energy-reducing agent. When the contact and sliding angles are ≥ 150° and ≤ 10°, respectively, the surface is classified as superhydrophobic (SHS). The study aimed to electrodeposit a microstructure with micronanometric roughness of nickel, stearic acid (Al/Ni-SA), and nickel, stearic acid with multi-layered carbon nanotubes (Al/Ni-SA-MWCNT) on aeronautical aluminum 7050. The obtained contact angles were close to 160°, and sliding angles were less than 1°, characterizing the superhydrophobic and self-cleaning nature. Freezing tests were conducted, and the deposit with MWCNT showed longer freezing times at -22°C. The Al/Ni-SA-MWCNT condition also exhibited the best corrosion resistance with corrosion current superior by two orders of magnitude compared to the Al/Ni-Sa condition. The coatings demonstrated impressive performance, achieving corrosion inhibition efficiencies close to 100%. |
| Databáze: | Directory of Open Access Journals |
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