Corrosion resistance of a superelastic NiTi alloy coated with graphene–based coatings

Araujo, Athos Fernandes; Ferreira, Mozart Martins; Felisberto, Marcos Daniel Vozer; Sicupira, Dalila Chaves; Santos, Leandro Arruda

doi:10.1016/j.porgcoat.2022.106727

Cited by 10 publications

(5 citation statements)

References 46 publications

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“…Based on the comparison of 2D AFM images (Figure a,c,e), it could be commented that corroded Cu had rougher surfaces than LLCE-coated Cu and pristine Cu. This fact announced that the LLCE coating prevented corrosion of Cu better than its natural oxide layer. , In addition, 3D AFM images (Figure b,d,f) confirmed that corroded Cu had more peaks and valleys. Also, the height scale of the images suggested that roughness was also higher than LLCE-coated Cu and pristine Cu.…”

Section: Resultsmentioning

confidence: 77%

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Thin-Film Coating of the Hydrophobic Lotus Leaf on Copper by the Floating Film Transfer Method and Investigation on the Corrosion Behavior of Coated Copper in Saline Water

Jha

Jana

Pal

et al. 2022

Ind. Eng. Chem. Res.

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Copper (Cu) is an important base material for many electrical, thermal, and home applications. However, corrosion of Cu is a serious concern in chloride-containing solutions. The present work reports lotus leaf coating on Cu as a successful preventive solution. After preparation of a lotus leaf chloroform extract (LLCE), an ultrathin (15 ± 5 nm) film of LLCE is created by the floating film transfer method (FFTM) and transported on Cu through stamping. LLCE has been characterized by UV–visible spectroscopy (UVS), nuclear magnetic resonance (NMR), and Fourier transform infrared (FTIR) spectroscopy (FTIRS) techniques, which disclose that LLCE meets the expectations of being rich in biomolecules. The LLCE coating on Cu was done in a layerwise manner (1–3) and analyzed with scanning electron microscopy (SEM) and a drop shape analyzer (DSA). The SEM images show that there are films on Cu, and DSA suggests that LLCE coatings have increased the hydrophobicity of Cu (contact angle 96) to greater than 100. Open-circuit potential (OCP) curves, Tafel polarization (TP) curves, electrochemical impedance spectroscopy (EIS), SEM, energy-dispersive X-ray (EDX) spectroscopy, and atomic force microscopy (AFM) have been deployed to investigate the LLCE-coated Cu corrosion in 0.5 M sodium chloride. The LLCE film of three layers (3L) on Cu is found to be the most efficient (97%, TP) against corrosion among the tested ones. SEM and AFM images evidently show that the 3L-coated Cu was the least damaged through corrosion. The reason for prevention can be recommended as blockage of the openings on the bare Cu surface by LLCE films.

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Section: Resultsmentioning

confidence: 77%

“…This fact announced that the LLCE coating prevented corrosion of Cu better than its natural oxide layer. 53,54 In addition, 3D AFM images (Figure 11b,d,f) confirmed that corroded Cu had more peaks and valleys. Also, the height scale of the images suggested that roughness was also higher than LLCE-coated Cu and pristine Cu.…”

Section: Eis Datamentioning

confidence: 78%

Thin-Film Coating of the Hydrophobic Lotus Leaf on Copper by the Floating Film Transfer Method and Investigation on the Corrosion Behavior of Coated Copper in Saline Water

Jha

Jana

Pal

et al. 2022

Ind. Eng. Chem. Res.

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“…A polarização potenciodinâmica (PP) ao ser aplicada em amostras de ligas de NiTi tem como objetivo obter um sinal de corrente que relacione potencial e corrente durante o processo de polarização eletroquímica. As análises de PP em revestimentos de metais refletem os efeitos de barreira e resistência dos revestimentos, sendo útil para revelar anatureza protetora do revestimento em conjunto com barreira protetorafornecida pelo óxido de titânio formado na superfície do substrato [24].…”

Section: Resultsunclassified

Aumento Da Resistência À Corrosão De Uma Liga De Niti Superelástica Com Revestimentos a Base De Óxido De Grafeno E De Óxido De Grafeno Reduzidoꓽ Um Estudo Comparativo

Koga,

Campideli,

Batista

et al. 2023

ABM Proceedings

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ResumoO grafeno bidimensional tem atraído atenção em vários campos devido à sua alta impermeabilidade e hidrofobicidade, alta dureza e propriedades de lubrificação. Suas características mais relevantes qualificam o grafeno como um material ideal para revestimentos anticorrosivos, podendo melhorar a resistência à corrosão/desgaste de materiais metálicos. Porém, o grafeno exibe alta inércia química necessitando de grupos funcionais para reagir com substratos metálicos, levando a baixa força de adesão com o substrato. Com isso, o uso de derivados do grafeno puro, como o óxido de grafeno (GO) e o óxido de grafeno reduzido (rGO), torna-se fundamental uma vez que esses possuem muitos grupos funcionais contendo oxigênio nas suas superfícies, melhorando a atividade química do material. O objetivo deste estudo foi comparar o desempenho de dois revestimentos anticorrosivos sobre a superfície de uma liga de NiTi: um contendo GO e outro rGO depositados através da técnica por imersão (DIP-coating). Estes revestimentos foram caracterizados por Microscopia Eletrônica de Varredura (MEV), Microscopia de Força Atômica (MFA) e Difração de Raios-X (DRX). A resistência à corrosão das amostras foi estudada por técnicas de polarização potenciodinâmica (PP) e espectroscopia de impedância eletroquímica (EIE). Os resultados mostraram uma melhora significativa na resistência à corrosão das ligas revestidas. Palavras-chave:Níquel-titânio, Revestimento por imersão, Corrosão

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“…High spatial resolution and three-dimensional surface topography of specimens can be achieved with AFM. It is a highly sensitive and reliable technique that offers a suitable means of obtaining qualitative and quantitative information regarding the surface-related properties of rotary NiTi files [27].…”

Section: Discussionmentioning

confidence: 99%

Influence of 17% EDTA and Sapindus mukorossi on the Surface Property of Protaper Gold Rotary Endodontic Instruments

et al. 2022

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The aim of the study was to evaluate the influence of 17% ethylenediaminetetraacetic acid (EDTA) and ethanolic extract of Sapindus mukorossi (S. mukorossi) in combination with canal shaping on surface properties of ProTaper Gold rotary endodontic file. Sixteen F1 ProTaper Gold rotary files underwent the standard protocol for root canal treatment using two irrigants (S. mukorossi and 17% EDTA) in single-rooted decoronated teeth. Eight unused files were used as a control. All files were examined under an atomic force microscope (AFM) to evaluate surface roughness (Ra) and root mean square (RMS). Data were analyzed using the t-test. RMS and Ra values of the control file were 1.37 and 0.607, respectively. The mean RMS (3.70 ± 1.41) and mean Ra (2.89 ± 1.41) in EDTA group were significantly higher than the control file (p < 0.05). The mean RMS in the S. mukorossi group (1.77 ± 0.66) did not show any significant difference with the control (p > 0.05). The Ra of S. mukorossi group (1.09 ± 0.05) was significantly higher than the control file (p < 0.05). Moreover, the mean RMS and Ra were found to be significantly higher in the EDTA group compared to the S. mukorossi group (p < 0.05). The mean Ra and RMS values of the ProTaper Gold files used to prepare canals using 17% EDTA and S. mukorossi irrigation were significantly higher than the control files. The EDTA-treated ProTaper Gold rotary files demonstrated higher surface Ra and RMS than the S. mukorossi files.

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Corrosion resistance of a superelastic NiTi alloy coated with graphene–based coatings

Cited by 10 publications

References 46 publications

Thin-Film Coating of the Hydrophobic Lotus Leaf on Copper by the Floating Film Transfer Method and Investigation on the Corrosion Behavior of Coated Copper in Saline Water

Thin-Film Coating of the Hydrophobic Lotus Leaf on Copper by the Floating Film Transfer Method and Investigation on the Corrosion Behavior of Coated Copper in Saline Water

Aumento Da Resistência À Corrosão De Uma Liga De Niti Superelástica Com Revestimentos a Base De Óxido De Grafeno E De Óxido De Grafeno Reduzidoꓽ Um Estudo Comparativo

Influence of 17% EDTA and Sapindus mukorossi on the Surface Property of Protaper Gold Rotary Endodontic Instruments

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