Electrochemically generated sol–gel films as inhibitor containers of superhydrophobic surfaces for the active corrosion protection of metals

Xue-fen, Zhang; Chen, Ruijiao; Liu, Yanhua; Hu, Ji-Ming

doi:10.1039/c5ta07443f

Cited by 87 publications

(27 citation statements)

References 51 publications

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“…Films based on TE-OS/DTMS electrodeposited on AA2024-T3 alloy in the presence of cerium nitrate were studied by Zhang et. al [16]. Through the water contact angle analysis, the authors observed angles near to 160º indicating the formation of superhydrofobic surfaces, which remains unchanged with the introduction of cerium.…”

Section: Introducionmentioning

confidence: 94%

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

Cendron

Azambuja

2016

Matéria (Rio J.)

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RESUMOO objetivo deste estudo foi investigar o comportamento corrosivo da liga de alumínio AA2024-T3 tratada com filmes obtidos pela combinação de tetraetilortossilicato (TEOS) com ODPA (ácido octadecilfosfônico) em solução de NaCl 0,05 mol L -1 . As razões volumétricas de TEOS/etanol/água utilizadas foram 4:90:6 e 4:80:16, e os filmes formados foram denotados como 90TEOS e 80TEOS respectivamente. A adição de áci-do fosfônico nos filmes TEOS foi testada como uma maneira de se obter um efeito cooperativo, a fim de melhorar as características de proteção do revestimento. Análises de espectroscopia de impedância electroquí-mica (EIE) e polarização potenciodinâmica mostraram que os filmes 90TEOS na presença de ODPA apresentaram um maior módulo de impedância após 168 horas de imersão em solução de cloreto. Os resultados obtidos indicam que os filmes obtidos apenas com TEOS não fornecem uma proteção adequada contra a corrosão, evidenciando a existência de sinergismo entre o ácido fosfônico e TEOS. Essa melhora foi relacionada à maior hidrofobicidade dos revestimentos.Palavras chaves: Liga de Alumínio, Silano, Ácido fosfônico, EIE. ABSTRACTThe aim of this study was to investigate the corrosion behavior of aluminum alloy AA2024-T3 substrates treated with self-assembled films obtained by combining tetraethylorthosilicate (TEOS) with ODPA (octadecylphosphonic acid)in a 0.05 mol L-1 NaCl solution. The volumetric ratios of TEOS/ethanol/water used were 4:90:6 and 4:80:16, and the corresponding films formed were denoted as 90TEOS and 80TEOS, respectively. The addition of phosphonic acid to TEOS films was tested as a way to obtain a cooperative effect in order to improve the protective characteristics of the coating. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization data showed that the 90 TEOS films in the presence of ODPA had the highest impedance modulus after 168h of immersion in chloride solution. The results obtained indicate that undoped sol-gel coatings do not provide adequate protection against corrosion, evidenced by the existence of synergism between phosphonic acid and TEOS, improving the hydrophobicity of the films.

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Section: Introducionmentioning

confidence: 94%

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

Cendron

Azambuja

2016

Matéria (Rio J.)

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“…When damage occurs, the corrosion inhibitors leach out and form barrier films by chemical complexation or physical adsorption on the exposed substrates [38][39][40] . A few recent studies have incorporated corrosion inhibitors to superhydrophobic coatings [41][42][43] . For example, Zhang et al recently prepared cerium nitrate or BTA-containing superhydrophobic films on aluminum alloy via the electro-assisted deposition of silica microparticles 41 .…”

Section: Introductionmentioning

confidence: 99%

“…A few recent studies have incorporated corrosion inhibitors to superhydrophobic coatings [41][42][43] . For example, Zhang et al recently prepared cerium nitrate or BTA-containing superhydrophobic films on aluminum alloy via the electro-assisted deposition of silica microparticles 41 . Results obtained using the scanning vibrating electrode technique (SVET) revealed that the corrosion activity in the scratched area could be effectively suppressed by the corrosion inhibitors, thereby exerting a self-healing corrosion inhibition effect.…”

Section: Introductionmentioning

confidence: 99%

Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties

et al. 2017

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Important noteTo cite this publication, please use the final published version (if applicable). Please check the document version above. CopyrightOther than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policyPlease contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. AbstractThis work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity is shown to be rapidly healed through a simple heat treatment at 60 °C for 20 min. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) were used to study the anti-corrosion performance of the scratched and the healed superhydrophobic coatings immersed in a 3.5 wt% NaCl solution. The results revealed that the anti-corrosion performance of the scratched coatings was improved upon the incorporation of BTA. After the heat treatment, the scratched superhydrophobic coatings exhibited excellent recovery of the anti-corrosion performance, which is attributed to the closure of the scratch by the shape memory effect and to the improved inhibition efficiency of BTA. Furthermore, we found that the pre-existing corrosion product inside the coating scratch could hinder the scratch closure by the shape memory effect and reduce the coating adhesion in the scratched region. However, the addition of BTA effectively suppressed the formation of corrosion product and enhanced the self-healing and adhesion performance under this condition. Importantly, we also demonstrated that the coating can be autonomously healed within 1 h in an outdoor environment using sunlight as the heat source.

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“…contact angle (CA) and a maximum 10°. sliding angle (SA) for water droplets have attracted extensive attention due to their great significance in both fundamental research and potential applications in the fields of oilwater separation [1][2][3][4], water collection [5], anti-fogging [6], antiicing [7], energy conversation [8], self-cleaning [9,10], anti-corrosion [11,12], and friction drag reduction [13], etc. In general, there are two key points to equip surfaces with superhydrophobicity: creating a suitable surface roughness with micro-nanoscale hierarchical structures and low surface energy material modifications, which derived from the phenomenon of superhydrophobicity in nature [14,15].…”

Section: Introductionmentioning

confidence: 99%

Multi-walled carbon nanotubes enhanced superhydrophobic MWCNTs-Co/a-C:H carbon-based film for excellent self-cleaning and corrosion resistance

Zhu

Zhou

Yan

et al. 2018

Diamond and Related Materials

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A robust superhydrophobic MWCNTs-Co/a-C:H carbon-based film was successfully fabricated for the first time by a safe technology, namely electrochemical deposition. The multi-walled carbon nanotubes (MWCNTs) and Co nano-particles were confirmed to tailor a micro-nanoscale hierarchical surface and nanocrystallite/amorphous microstructure. The resulting WCNTs-Co/a-C:H carbon-based film exhibited complete water repellency with the contact angle (158.1°) and much smaller sliding angle (2.98°), fairly strong mechanical property, excellent corrosion resistance and self-cleaning ability. This research highlights a promising route for the preparation of robust superhydrophobic film, providing potential uses including self-cleaning, antifouling and anti-corrosion applications such as ship hulls and aeroplane wings.

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Electrochemically generated sol–gel films as inhibitor containers of superhydrophobic surfaces for the active corrosion protection of metals

Abstract: The present work shows a new contribution to the design of superhydrophobic surfaces with the additional function of active corrosion protection, through the encapsulation of inhibiting agents.

Cited by 87 publications

References 51 publications

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

Revestimentos a base de TEOS/ácido fosfônico como tratamento anticorrosivo para a liga AA2024-T3

Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties

Multi-walled carbon nanotubes enhanced superhydrophobic MWCNTs-Co/a-C:H carbon-based film for excellent self-cleaning and corrosion resistance

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