Journal
MATERIALS
Volume 15, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/ma15238549
Keywords
super-hydrophobicity; self-assembling; aluminum alloy; surface treatment; corrosion
Categories
Funding
- PONR&I 2014-2020-project Thalassa [ARS01_00293]
Ask authors/readers for more resources
This paper demonstrates the tailoring of superhydrophobic surfaces on AA6082 aluminum alloy through chemical etching and silane self-assembling. The results show that the optimal treatment effect is achieved with an etching time of 20s, resulting in a surface with a microscale coral-like structure and ordered pixel-like nanostructure, exhibiting superhydrophobic behavior.
In this paper, the tailoring of superhydrophobic surfaces on AA6082 aluminum alloy by chemical etching in an HF/HCl solution, followed by silane self-assembling, was applied for enhanced corrosion protection in the marine field. In particular, different etching times were considered in order to optimize the treatment effect. The results indicate that all the prepared surfaces, after silanization, were characterized by superhydrophobic behavior with a contact angle higher than 150 degrees. The contact and sliding angles strongly depend on the surface morphology at varying etching times. The optimum was observed with an etching time of 20 s, where a microscale coral-like structure coupled with a homogeneous and ordered pixel-like nanostructure was obtained on the aluminum surface showing a Cassie-Baxter superhydrophobic behavior with a water contact angle of 180 degrees and a sliding angle equal to 0 degrees. All superhydrophobic surfaces achieved an enhanced corrosion protection efficiency and impedance modulus up to two orders of magnitude higher than the as-received AA6082 in simulated seawater.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available