Facile fabrication and evaluation of self-healing Zn-Al layered double hydroxide superhydrophobic coating on aluminum alloy

The preparation of superhydrophobic coating on the surface of aluminum alloy can effectively improve its performance in the harsh environment. In this work, a superhydrophobic coating with water contact angle (WCA) up to 157.5 ± 0.5° and sliding angle less than 3° is prepared on aluminum alloy 6061...

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Bibliographic Details
Published inJournal of materials science Vol. 56; no. 26; pp. 14803 - 14820
Main Authors Zhu, Guang, Zhao, Yan, Liu, Lin, Wang, Liyuan, Wang, Jun, Yu, Sirong
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2021
Springer
Springer Nature B.V
Subjects
Acid resistance
Adsorption
Alkaline cleaning
Alloys
Aluminum
Aluminum alloys
Aluminum base alloys
Characterization and Evaluation of Materials
Chemical bonds
Chemistry and Materials Science
Classical Mechanics
Coating
Coatings
Composite structures
Contact angle
Corrosion and anti-corrosives
Corrosion prevention
Crystallography and Scattering Methods
High temperature
Hydrophobic surfaces
Hydrophobicity
Hydrothermal reactions
Hydroxides
Materials Science
Metals & Corrosion
Morphology
Oxygen plasma
Plasma etching
Polymer Sciences
Saturated fatty acids
Solid Mechanics
Specialty metals industry
Stability
Stearic acid
Substrates
Zinc
Zinc compounds
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Summary:The preparation of superhydrophobic coating on the surface of aluminum alloy can effectively improve its performance in the harsh environment. In this work, a superhydrophobic coating with water contact angle (WCA) up to 157.5 ± 0.5° and sliding angle less than 3° is prepared on aluminum alloy 6061 substrate by simple and environment-friendly hydrothermal reaction and stearic acid modification. The in situ growth coating is composed of Zn-Al layered double hydroxide and the morphology of the coating was a micro–nano composite structure with micro-sheet and nano-needle. The stearic acid is combined with the coating by physical adsorption and chemical bonding. The superhydrophobic coating imparts the properties of low adhesion, self-cleaning, and anti-corrosion to the aluminum alloy substrate, and it also has good high-temperature stability, acid and alkali resistance, mechanical stability and time durableness. The superhydrophobic coating can spontaneously recover 7 times after damaged by oxygen plasma etching. The outstanding comprehensive performance of the coating makes it a promising application for protection of aluminum alloy. Graphical abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06247-9