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Journal ArticleDOI

Facile fabrication of superhydrophobic brass surface for excellent corrosion resistance

16 Feb 2020-Surface Engineering (Taylor & Francis)-Vol. 36, Iss: 6, pp 660-664
TL;DR: In this article, superhydrophobic surfaces were fabricated using 1H,1H, 2H,2H 2H-perfluorooctyltriethoxysilane monolayer deposition on thermally oxidized brass.
Abstract: In this study, superhydrophobic surfaces were fabricated using 1H,1H,2H,2H-perfluorooctyltriethoxysilane monolayer deposition on thermally oxidized brass. The superhydrophobic surface showed a cont...
Citations
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Journal ArticleDOI
TL;DR: In this article, three hierarchical super-hydrophobic Cu coating via facile pulse electrodeposition with microstructure size of 10 −15, 30 −40, and 60 −70 µm were presented.

31 citations

Journal ArticleDOI
TL;DR: In this paper, a review explores how the synchronised function of materials and coating technologies contribute to the enhanced anticorrosive property of superhydrophobic coatings, and the role and need of dynamic fabrication strategies in achieving better corrosion inhibition activities.

19 citations

Journal ArticleDOI
TL;DR: In this paper , a simple and interesting method for fabricating super-hydrophobic surfaces without destroying the metal substrate was proposed, which exhibited a high contact angle (CA) of 158.5 ± 0.4° and a low slide angle (SA) of 2.1 − 0.2°.

8 citations

Journal ArticleDOI
TL;DR: In this article, the influence of tool electrode material while surface modification of Ti-alloy through the micro-electrical discharge coating (μEDC) process was assessed. Brass and tungsten micro-tool material was used to assess the influence.
Abstract: The work aims to assess the influence of tool electrode material while surface modification of Ti-alloy through the micro-electrical discharge coating (μEDC) process. Brass and tungsten micro-tool ...

8 citations


Cites background from "Facile fabrication of superhydropho..."

  • ...Figures 9 and 10 give an insight into the already established fact that the deposition occurs on the Ti-alloy surface in the form of a recast layer....

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  • ...This results in low heat concentration over the Ti-alloy work surface, creating smaller craters, thus reducing the SR. Additionally, as the WS2 powder content varies from 6 to 12 g L−1, large-sized craters are formed as a result of the primary discharges and get suppressed due to the accumulation of excessive powders in the gap....

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  • ...Therefore, brass does not favour the absorption of enough heat energy, which eventually gets distributed throughout the work piece, forming tinier or smaller craters on the Ti-alloy surface....

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  • ...The high heat generated in the powder-rich spark gap allows the molten material flow coming towards the Ti-alloy work surface....

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  • ...In the current research, the influence of different micro-tools (brass and tungsten), the infusion of powders in the EDM oil (dielectric liquid), and the coating process parameters on the surface modification of Ti-alloy were investigated....

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Journal ArticleDOI
27 Apr 2020
TL;DR: In this paper, the surface morphology of the samples was investigated using scanning electron microscopy (SEM) and contact profilometer, and the surface with micropillar structures with higher roughness factor exhibited improved nonfouling behavior.
Abstract: Superhydrophobic surfaces with high adhesion have attracted huge attention in recent research work due to their versatile applications including transportation of microdroplet without any loss. Modification of metallic surfaces to achieve such properties is important to extend their applications. Especially, the superhydrophobic surfaces with very low bacterial adhesion have attracted intense attention in medical, food, and pharmaceutical industries. Here, we have fabricated different micropatterns on aluminium surfaces using a simple and cost-effective micro-imprinting technique. The surface chemistry was modified through a coating of low surface energy material 1H,1H,2H,2H-Perfluorooctyl-trichlorosilane (FOTS) using vapor deposition technique. Surface morphology of the samples was investigated using scanning electron microscopy (SEM) and contact profilometer. Results show a significant influence of the surface morphology on the wetting, adhesion and anti-bacterial properties. Surfaces composed of discrete micropillars showed higher de-wetting compared to surface containing continuous zig-zag micro lines even despite lower roughness factor. However, the opposite trend was observed in case of adhesion. These results are explained based on wetting state and difference in liquid-air interface pinning. Further, the developed samples showed higher water-retaining ability compared to rose-petal along with superhydrophobicity. The surface with micropillar structures with higher roughness factor exhibited improved non-fouling behavior which has been quantified by spot assays and atomic force microscopy (AFM). This study opens up the possibility of fabricating multifunctional metal surfaces on a large scale by a cost-effective, environment friendly and easily scalable processing route.

6 citations

References
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Book
29 Oct 1996
TL;DR: In this paper, the Gibbs-Duhem relation for binary oxides has been used to derive a Gibbs-Thompson equation for the relationship between Fick's First Law and Eq.
Abstract: INTRODUCTION Introduction Definition of Ceramics Elementary Crystallography Ceramic Microstructures Traditional Versus Advanced Ceramics General Characteristics of Ceramics Applications The Future BONDING IN CERAMICS Introduction Structure of Atoms Ionic versus Covalent Bonding Ionic Bonding Ionically Bonded Solids Covalent Bond Formation Covalently Bonded Solids Band Theory of Solids Summary Appendix 2A: Kinetic Energy of Free Electrons STRUCTURE OF CERAMICS Introduction Ceramic Structures Binary Ionic Compounds Composite Crystal Structures Structure of Covalent Ceramics Structure of Silicates Lattice Parameters and Density Summary Appendix 3A: Ionic Radii EFFECT OF CHEMICAL FORCES ON PHYSICAL PROPERTIES Introduction Melting Points Thermal Expansion Young's Modulus and the Strength of Perfect Solids Surface Energy Summary THERMODYNAMIC AND KINETIC CONSIDERATIONS Introduction Free Energy Chemical Equilibrium and the Mass Action Expression Chemical Stability Domains Electrochemical Potentials Charged Interfaces, Double Layers, and Debye Lengths Gibbs-Duhem Relation for Binary Oxides Kinetic Considerations Summary Appendix 5A: Derivation of Eq. (5.27) DEFECTS IN CERAMICS Introduction Point Defects Linear Defects Planar Defects Summary DIFFUSION AND ELECTRICAL CONDUCTIVITY Introduction Diffusion Electrical Conductivity Ambipolar Diffusion Relationships between Self-, Tracer, Chemical, Ambipolar, and Defect Diffusion Coefficients Summary Appendix 7A: Relationship between Fick's First Law and Eq. (7.30) Appendix 7B: Effective Mass and Density of States Appendix 7C: Derivation of Eq. (7.79) Appendix 7D: Derivation of Eq. (7.92) PHASE EQUILIBRIA Introduction Phase Rule One-Component Systems Binary Systems Ternary Systems Free-Energy Composition and Temperature Diagrams Summary FORMATION, STRUCTURE, AND PROPERTIES OF GLASSES Introduction Glass Formation Glass Structure Glass Properties Glass-Ceramics Summary Appendix 9A: Derivation of Eq. (9.7) SINTERING AND GRAIN GROWTH Introduction Solid-State Sintering Liquid-Phase Sintering Hot Pressing and Hot Isostatic Pressing Summary Appendix 10A: Derivation of the Gibbs-Thompson Equation Appendix 10B: Radii of Curvature Appendix 10C: Derivation of Eq. (10.20) Appendix 10D: Derivation of Eq. (10.22) MECHANICAL PROPERTIES: FAST FRACTURE Introduction Fracture Toughness Strength of Ceramics Toughening Mechanisms Designing with Ceramics Summary CREEP, SUBCRITICAL CRACK GROWTH, AND FATIGUE Introduction Creep Subcritical Crack Growth Fatigue of Ceramics Lifetime Predictions Summary Appendix 12A: Derivation of Eq. (12.24) THERMAL PROPERTIES Introduction Thermal Stresses Thermal Shock Spontaneous Microcracking of Ceramics Thermal Tempering of Glass Thermal Conductivity Summary DIELECTRIC PROPERTIES Introduction Basic Theory Equivalent Circuit Description of Linear Dielectrics Polarization Mechanisms Dielectric Loss Dielectric Breakdown Capacitors and Insulators Summary Appendix 14A: Local Electric Field MAGNETIC AND NONLINEAR DIELECTRIC PROPERTIES Introduction Basic Theory Microscopic Theory Para-, Ferro-, Antiferro-, and Ferrimagnetism Magnetic Domains and the Hysteresis Curve Magnetic Ceramics and their Applications Piezo- and Ferroelectric Ceramics Summary Appendix 15A: Orbital Magnetic Quantum Number OPTICAL PROPERTIES Introduction Basic Principles Absorption and Transmission Scattering and Opacity Fiber Optics and Optical Communication Summary Appendix 16A: Coherence Appendix 16B: Assumptions Made in Deriving Eq. (16.24) INDEX *Each chapter contains Problems and Additional Reading.

728 citations

Journal ArticleDOI
TL;DR: In this article, a comprehensive review is presented on the researches and developments related to superhydrophobicity phenomena, fabrication of super-hydrophobic surface and applications, and significant attention is paid to state of the art on corrosion performance of super hydrophobic coatings.

395 citations


"Facile fabrication of superhydropho..." refers background in this paper

  • ...less than 10° have attracted considerable attention by the research community for limiting the damage caused by corrosion [6]....

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Journal ArticleDOI
18 Mar 2011-Langmuir
TL;DR: The corrosion resistant performance and durability of the superhydrophobic surface on magnesium alloy coated with nanostructured cerium oxide film and fluoroalkylsilane molecules in corrosive NaCl aqueous solution were investigated using electrochemical and contact angle measurements.
Abstract: The corrosion resistant performance and durability of the superhydrophobic surface on magnesium alloy coated with nanostructured cerium oxide film and fluoroalkylsilane molecules in corrosive NaCl aqueous solution were investigated using electrochemical and contact angle measurements. The durability of the superhydrophobic surface in corrosive 5 wt % NaCl aqueous solution was elucidated. The corrosion resistant performance of the superhydrophobic surface formed on magnesium alloy was estimated by electrochemical impedance spectroscopy (EIS) measurements. The EIS measurements and appropriate equivalent circuit models revealed that the superhydrophobic surface considerably improved the corrosion resistant performance of magnesium alloy AZ31. American Society for Testing and Materials (ASTM) standard D 3359−02 cross cut tape test was performed to investigate the adhesion of the superhydrophobic film to the magnesium alloy surface. The corrosion formation mechanism of the superhydrophobic surface formed on th...

291 citations

Journal ArticleDOI
01 May 1989-Langmuir
TL;DR: Effets en fonction du temps de traitement, evalues par spectrometrie electronique RX and mesure de l'angle de contact. Introduction de groupements oxygenes for des traitements courts; modifications profondes de surface sans modification chimique for temps plus longs
Abstract: Effets en fonction du temps de traitement, evalues par spectrometrie electronique RX et mesure de l'angle de contact. Introduction de groupements oxygenes pour des traitements courts; modifications profondes de surface sans modification chimique pour temps plus longs

271 citations

Journal ArticleDOI
TL;DR: In this paper, a facile and controllable anodization approach to fabricate super-hydrophobic CuO nanoneedle array (NNA) films for the enhancement of corrosion resistance of copper substrates was reported.
Abstract: With unique water-repellency and self-cleaning properties, superhydrophobic surfaces promise a great potential of anticorrosion for engineered metals. The current study reports a facile and controllable anodization approach to fabricate superhydrophobic CuO nanoneedle array (NNA) films for the enhancement of corrosion resistance of copper substrates. The anodic CuO NNA films were grown on copper foils by electrochemical anodization in an aqueous KOH solution for different anodization times. The morphological features and crystalline structures of the anodic CuO NNA were characterized by SEM-EDS and XRD. The superhydrophobicity on the hierarchical CuO NNA films was achieved by chemical modification with fluoroalkyl-silane (FAS-17). The presence of low surface energy fluorosilanized carbon (–CFx) groups on the FAS-modified surfaces was ascertained by EDS, XPS and water contact angle analyses. The wetting behaviour of the FAS-modified surfaces was investigated to elucidate the correlation between the static water contact angles, surface roughness, dynamic water contact angle hysteresis, and anodization time. The FAS-modified copper surfaces demonstrated not only the desirable superhydrophobicity with a water contact angle as high as approximately 169° and contact angle hysteresis as low as about 5°, but also substantially improved corrosion resistance in an aqueous NaCl solution (3.5%) with an inhibition efficiency higher than 90%, as revealed by means of Tafel plots and EIS measurements. The stability and durability of the superhydrophobic FAS-modified surfaces were evaluated by observing the change in surface wettability and geometric microstructures as a function of exposure time in an aqueous NaCl solution.

186 citations


"Facile fabrication of superhydropho..." refers background in this paper

  • ...range of engineering materials including copper [7,8], stainless steel [9], magnesium [10] and aluminium [11,12]....

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