Superhydrophobic Surfaces Based on Nickel Stearate: An Innovative Approach to Coatings on 7050 Aeronautical Aluminum Alloy

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 s...

Full description

Saved in:
Bibliographic Details
Published inMaterials research (São Carlos, São Paulo, Brazil) Vol. 27; no. suppl 1
Main Authors Silva, Jedaías J. da, Guimarães, Ana L. C., Silva Filho, Walter L. C. da, Silva, Rafael G. C. da, Malta, Maria I. C., Morais, Dayanne D. S., Urtiga Filho, Severino L., Vieira, Magda R. S.
Format Journal Article
LanguageEnglish
Portuguese
Published ABM, ABC, ABPol 01.01.2024
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects
AA7050
Aeronautical
ENGINEERING, CHEMICAL
Ice-resistant
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
MWCNT
Nickel stearate
Superhydrophobicity
Nickel stearate
MWCNT
Superhydrophobicity
AA7050
Ice-resistant
Aeronautical
Online AccessGet full text

Cover

More Information
Summary: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%.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-mr-2023-0562