Synergistic effect of diethylene triamine penta(methylene phosphonic acid) and graphene oxide barrier on anti-scaling and anti-corrosion performance of superhydrophobic coatings

In this study, a novel diethylene triamine penta(methylene phosphonic acid) (DTPMPA)- and graphene oxide (GO)-modified superhydrophobic anodized aluminum (DGSAA) coating was fabricated. The obtained coatings were characterized by scan electron microscopy, X-ray diffraction, Fourier transform infrare...

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Bibliographic Details
Published in:Frontiers of materials science 2023-09, Vol.17 (3), p.230650, Article 230650
Main Authors: Zhu, Mingliang, Li, Hongwei, Yuan, Ruixia, Qian, Huijuan, Wang, Huaiyuan
Format: Article
Language:English
Subjects:
Aluminum
Anodizing
anti-corrosion
anti-scaling
barrier
Calcium carbonate
Calcium ions
Chemistry and Materials Science
Coatings
Corrosion prevention
Diethylene triamine
DTPMPA
Electrochemical impedance spectroscopy
Fourier transforms
Graphene
graphene oxide
Hydrophobic surfaces
Hydrophobicity
Infrared analysis
Infrared spectroscopy
Materials Science
Methylene
Phosphonic acids
Raman spectroscopy
Research Article
Scale (corrosion)
Spectrum analysis
Synergistic effect
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Summary:In this study, a novel diethylene triamine penta(methylene phosphonic acid) (DTPMPA)- and graphene oxide (GO)-modified superhydrophobic anodized aluminum (DGSAA) coating was fabricated. The obtained coatings were characterized by scan electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and Raman analysis. After immersion in the supersaturated CaCO 3 solution for 240 h, the scaling mass of the DGSAA coating is only 50 % of that of the SAA coating. The excellent anti-scaling performance of the DGSAA coating comes from three barriers of the air layer, the DTPMPA:Ca 2+ chelate, and the lamellar GO, as well as the further active anti-scaling of DTPMPA:Ca 2+ at the coating–solution interface. DTPMPA and GO at the surface of the DGSAA coating exhibit an insertion structure. In the electrochemical impedance spectroscopy measurement, the impedance modulus of the DGSAA coating is three orders-of-magnitude higher than that of the anodized aluminum. The synergistic effect of DTPMPA stored in the porous structure of anodized aluminum and the barrier protection of superhydrophobicity and GO contributes to the excellent comprehensive performance of the DGSAA coating. This research provides a new perspective for designing anti-scaling and anti-corrosion superhydrophobic bi-functional coatings.
ISSN:2095-025X
2095-0268
DOI:10.1007/s11706-023-0650-z