Stability of Supehydrophobic Layers Formed by Organic Acids on the Surface of Aluminum Alloy 6063

Stability of Supehydrophobic Layers Formed by Organic Acids on the Surface of Aluminum Alloy 6063

The paper discusses the possibility of obtaining a uniformly inhomogeneous surface of aluminum alloy 6063 as a result of alkaline etching and laser processing. Further surface treatment with ethanol solutions of octadecylphosphonic (ODPA) and stearic acids leads to its superhydrophobization (SHP). T...

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Veröffentlicht in:Coatings (Basel) 2022-10, Vol.12 (10), p.1468
Hauptverfasser: Semiletov, Alexey M, Chirkunov, Alexander A, Grafov, Oleg Yu, Kuznetsov, Yurii I
Format: Artikel
Sprache:eng
Schlagworte:
Acids
Alloys
Aluminum alloys
Aluminum base alloys
Atmospheric corrosion
Chemical properties
Coating processes
Contact angle
Corrosion and anti-corrosives
Corrosion resistance
Corrosion resistant alloys
Corrosion tests
Electrochemical impedance spectroscopy
Etching
Ethanol
Hydrophobic surfaces
Hydrophobicity
Laser beam texturing
Laser processing
Lasers
Metals
Methods
Organic acids
Photoelectrons
Prevention
Surface preparation
Surface treatment
X ray photoelectron spectroscopy
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Zusammenfassung:The paper discusses the possibility of obtaining a uniformly inhomogeneous surface of aluminum alloy 6063 as a result of alkaline etching and laser processing. Further surface treatment with ethanol solutions of octadecylphosphonic (ODPA) and stearic acids leads to its superhydrophobization (SHP). The study of the degradation kinetics of SHP coatings in water and under conditions of neutral salt spray showed the high stability of ODPA films obtained on a laser-textured surface with an irregularities height of 9.82 μm. X-ray photoelectron spectroscopy (XPS) results showed that ODPA is chemisorbed on the alloy surface. High corrosion resistance of the surface with superhydrophobic layers confirmed by polarization measurements, electrochemical impedance spectroscopy (EIS) and corrosion tests.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings12101468