Development of superhydrophobic and corrosion resistant coatings on mild steel—A greener approach

Bandi, Pallavi; K, Venkata Muralidhar; Kausley, Shankar B.; Rai, Beena

doi:10.1016/j.mtcomm.2020.101625

Cited by 10 publications

(7 citation statements)

References 36 publications

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“…Nyquist plots of 1018 steel with/without sintered γ-Al2O3 film/HDTMS are presented in Figures 1 and 3 and Bode plots in Figures 2 and 4. The base metal showed two time constants, the first at high frequencies where a semicircle characteristic of a charge transfer process is observed; the second, at low frequencies an inductive loop is observed, due to the adsorption of corrosion products on the metal surface [14]. Although it may also be due to the dissolution of the metal substrate.…”

Section: Resultsmentioning

confidence: 94%

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Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel

et al. 2023

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The corrosion phenomenon affects several low carbon steel structures leading to excessive expenditure on coatings and other alternatives. However, the coatings used usually contain compounds that pollute the environment. Therefore, environmentally friendly, economical and transparent coatings or films have been developed. The sol-gel method is a reliable way for the development of anticorrosive films, as is the case of alumina or silica films. In this work, the protective capacity of an alumina/HDTMS film was studied. The alumina film was sintered at 350, 450 and 550 °C and then the 1% HDTMS film was deposited. The protective ability of the γ-Al2O3/HDTMS film was evaluated by Electrochemical Impedance Spectroscopy (EIS) and Potenciodynamic Polarization Curves (PDP). The electrochemical results showed that the Al2O3/HDTMS film provided better protection compared to the metallic substrate. The contact angle degree was measured and determined that the sintered alumina/HDTMS films showed hydrophobic and superhydrophobic properties.

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Section: Resultsmentioning

confidence: 94%

“…The γ-Al2O3-0.5-550/HDTMS film is observed that in the anodic branch there is lower current output, this may be due to the excellent adhesion and high compaction of the film on the metal surface. This may be due to a decrease in surface defects and micropores of the film and hence better protective ability [14].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel

et al. 2023

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“… 7 However, among the many superhydrophobic surface preparation processes, the sol–gel method can adapt to the surfaces of different substrates, but the cost is expensive. 8 The coating prepared by the etching method has good mechanical properties, but it is easy to be destroyed in strong acid and alkali environments, 9 and the template method cannot be used in industrial applications because of its complicated preparation process. 10 Under ultraviolet irradiation, the preparation of superhydrophobic surfaces by the thiol–ene click reaction has attracted great attention, in which C=C functional groups react with thiol functional groups on the surface.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Superhydrophobic Fabric Based on Dopamine and Michael Addition under Ultraviolet Light

Wang,

Xing,

Xing

et al. 2023

ACS Omega

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This work reports a simple, stable, and environmentally friendly method to prepare durable superhydrophobic surfaces. First, a polydopamine coating is formed by oxidative polymerization of dopamine to form a secondary reaction platform to provide reaction sites for subsequent experiments. We applied a polydopamine layer onto a fiber surface using the Michael addition-reaction-grafted tetrakis (3-mercaptopropionic acid) pentaerythritol ester, followed by the introduction of tetraallyl silane and (mercapto) methyl siloxane-dimethyl siloxane copolymer on the polydopamine by a thiol–ene click-reaction under ultraviolet light. The resulting superhydrophobic Nylon 56 fabric exhibited a 166° static contact angle as well as excellent stability. The surface morphology of all samples was observed by field emission scanning electron microscope, X-ray photoelectron spectroscopy and energy dispersion spectroscopy, and the elemental composition and surface chemical state of the samples were analyzed. It also had the ability of oil-water separation. Fabric with such benefits broadens the applicability and innovation of superhydrophobic textiles for environmental and industrial applications.

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“…Superhydrophobic surfaces present the ability to repel polar liquids such as water so that the angle formed between the solid surface and the tangent of a water droplet is superior to 150 o 1 . Such lack of affinity with water provides materials with important properties such as self-cleaning 2,3 , anti-fogging 4,5 , low friction in water 6,7 , and coatings with improved barrier against water permeation, and, consequently, corrosion protection [8][9][10] . Among the available methods to fabricate such surfaces, one not yet very well explored is the electrodeposition of sol-gel superhydrophobic coatings using silane precursors.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

et al. 2022

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The present work evaluated the structure and heterogeneities, surface chemistry, hydrophobicity level, and corrosion protection in a saline environment of electrodeposited sol-gel superhydrophobic coatings on carbon steel, using microscopy techniques, energy dispersive X-ray spectroscopy (EDX), water contact angle measurements, and electrochemical impedance spectroscopy (EIS). Furthermore, the effect of silane precursor concentration on the aforementioned response variables was tested. Regarding the structure, results point out rough deposits composed of two layers with different properties and thicknesses, and preferential deposition on the top area of the carbon steel coupon. Elemental mapping proved the chemical stability of the film in NaCl 3.5%wt., while increasing the amounts of silane precursor up to 40 mmol showed also increased results for water contact angle (157 o ), impedance modulus at 0.01 Hz (10 7 Ohm.cm 2 ), and film thickness (70 µm). However, the addition of greater amounts resulted in miscibility issues in the hydrolysis solution.

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Development of superhydrophobic and corrosion resistant coatings on mild steel—A greener approach

Cited by 10 publications

References 36 publications

Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel

Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel

Preparation of Superhydrophobic Fabric Based on Dopamine and Michael Addition under Ultraviolet Light

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

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Development of superhydrophobic and corrosion resistant coatings on mild steel—A greener approach

Cited by 10 publications

References 36 publications

Electrochemical Study of a Hydrophobic Film of γ-Al2O3/Hdtms on Low Carbon Steel

Electrochemical Study of a Hydrophobic Film of γ-Al2O3/Hdtms on Low Carbon Steel

Preparation of Superhydrophobic Fabric Based on Dopamine and Michael Addition under Ultraviolet Light

Evaluation of Structure, Heterogeneities, Thickness and Corrosion Protection of Electrodeposited Sol-Gel Superhydrophobic Coatings

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Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel

Electrochemical Study of a Hydrophobic Film of γ-Al₂O₃/Hdtms on Low Carbon Steel