Maximum Water Contact Angle Research Articles

Optimization of coating parameters for fabrication of robust superhydrophobic (SHP) aluminum and evaluation of corrosion performance in aggressive medium

The huge interest in superhydrophobic surfaces originates from their potential engineering applications in corrosion protection, antifouling, oil recovery, self-cleaning, anti-adhesion, anti-icing, medical dressing, drag reduction and radiative cooling. Despite the progress made in developing superhydrophobic (SHP) coatings, a key challenge is the ability to fabricate mechanically robust SHP surfaces and a proper understanding of the corrosion performance of SHP surfaces in aggressive conditions. Here, we report a simple, rapid, inexpensive, scalable and eco-friendly method for fabrication of mechanically durable superhydrophobic (SHP) aluminum surfaces with self-cleaning properties using a scalable dip-coating method. The coating parameters were optimized to obtain a robust coating with desirable properties such as water contact angle (WCA), sliding angle, self-cleaning, abrasion and corrosion resistance. To obtain good adhesion between the substrate and the coating, chemical etching and hydroxylation of the Al surface were used. At an optimal withdrawal speed of the substrate in the precursor solutions, a maximum WCA of 172.3° ± 1.1° (SA ~ 1° ± 1°) was achieved. The hierarchical micro-nano roughness and the presence of the Si-(CH3)3 group were responsible for the superhydrophobic behavior. The existence of a covalent bond between the Al surface and the middle connecting layer and –O-Si-CH3 groups on the surface of the SHP Al are confirmed by LRS and XPS, respectively. The electrochemical studies in 3.5 wt% NaCl solution show that the Rct value of SHP Al during the initial state was ~2 orders higher than that of the bare sample. The Cdl value of SHP Al was 6 orders less than that of bare after 1 h of exposure in chloride solution. On the SHP surface, a droplet with an impinging velocity of 0.36 m/s showed approximately 7 bounces. The superhydrophobicity of the SHP sample was preserved up to 150 cm abrasion distance. The hierarchical surface morphology and superhydrophobicity (WCA ~151°) were retained by the SHP samples even after 120 h of immersion in 3.5 wt% NaCl, which indicates its suitability in seawater applications such as ships, underwater instruments and pipelines and marine structures. Further, our work provides a framework to develop mechanically robust SHP coating for various applications.

Fabrication of stable and versatile superhydrophobic PTFE coating by simple electrodeposition on metal surface

Superhydrophobic coating has attracted increasing attention due to its exceptional performance, yet fabricating a stable superhydrophobic coating on metal surfaces remains challenging. In this study, a superhydrophobic PTFE coating on the stainless-steel surface with a high stability and versatile performance was fabricated by the simple electrodeposition and high-temperature curing. This approach allowed the superhydrophobic PTFE coating on any metal surfaces to be fabricated in a few minutes. It was found that the addition of water in the solution played a key role in the coating stability, which was speculated that a stable structure of MgO-MgCl2-H2O formed as an adhesive underlayer for the PTFE coating. Furthermore, the surface morphology and hydrophobicity of the coating could be controlled by the bubbles formation on samples surfaces by varying water contents during the electrodeposition. The coating exhibited a maximum water contact angle of 158 ± 2°, and the performance tests indicated that the superhydrophobic PTFE coating exhibits the outstanding stability, self-cleaning property, anti-condensation, corrosion resistance and anti-scale ability. The scale inhibiting rate of the coated surface was up to 80.75 % after 12-hour immersion in the CaCO3 solution. The optimized parameters for the electrodeposition route are highly desirable for the development of the advanced superhydrophobic PTFE coatings for various applications.

Crosslinking control of hydrophobic benzoxazine-based hybrid sol-gel coating for corrosion protection on aluminum alloys

Benzoxazine (Bz)-based hybrid sol-gel coating (TEOS-PBz) was prepared by compositing benzoxazine functional silane and Tetraethoxysilane (TEOS) and its distinct crosslinking structures were controlled by a designed curing procedure. The coatings' structures were analyzed by Fourier transform infrared spectroscopy, X-ray photoelectron spectrums and differential scanning calorimetry. It is evident that a prolonged curing procedure could promote curing of Bz functionality completely with high crosslinking degree in the coating, which is a key factor to the coatings' corrosion resistance. The hydrophobicity of the coating is also taken into account as this is also one of the factors affecting the corrosion protection performance. According to the result of electrochemical impedance spectroscopy, the TEOS-PBz with the maximum static water contact angle of 105.6 ± 0.4° showed the highest impedance with the value of Rct above 105 Ω after being immersed in 3.5 wt% NaCl aqueous solution for one week, more than one order of magnitude higher than traditional Tetraethoxysilane-Glycidoxypropyltriethoxysilane (TEOS-GPTES) hybrid sol-gel coating. It is possible to conclude that complete curing crosslinking structure with the conversion of Bz structure >94 % and high hydrophobicity contributed by less intermolecular hydrogen bonding ratio in the coating presented better corrosion protection performance.

Design and synthesis of waterborne light-responsive cellulose nanocrystal/fluorinated polyacrylate films toward oil/water repellent and self-healing properties

The development of environmentally friendly waterborne polymeric materials is becoming critical today. In this study, a kind of self-healing cellulose nanocrystal/fluorinated polyacrylate based on the reversible photo-induced dimerization of coumarin groups was prepared via RAFT-mediated Pickering emulsion polymerization using cellulose nanocrystal (CNC) particles modified with light-responsive amphiphilic copolymers as Pickering stabilizers. Emulsion polymerization and latex film properties were significantly varied in dependence on the amount of 7-(2-methacryloyloxyethoxy)-4-methylcoumarin (CMA) monomer. Hydrophobic, oleophobic and mechanical properties of the latex film were dynamic in response to UV light. The maximum water contact angle and CH2I2 contact angle increased by 6.1° and 2.3°on the irradiation of UV light at 365 nm, respectively. The tensile strength of latex film increased initially with increasing amount of CMA increased, from 0 up to 4 wt%, and then decreased. The maximum tensile value increased from 3.0 MPa to 6.4 MPa after the dimerization reaction activated by 365 nm UV light. Results from atomic force microscope (AFM) and energy dispersive X-ray spectrometer (EDX) revealed that latex film possessed a roughness structure and the fluorine had a remarkable enrichment on the film-air interface. Moreover, latex films showed an excellent surface scratch self-healing ability owing to the reversible dimerization reaction of the coumarin groups, and the reversible dimerization reaction of coumarin groups within cellulose nanocrystal/fluorinated polyacrylate polymer was extensively investigated via FT-IR spectrometer and differential scanning calorimetry (DSC). The fruitful outcomes indicated that light-responsive cellulose nanocrystal/fluorinated polyacrylate exhibited a greatly potential application as a smart material.

Spirocyclic alkoxysilane synthesized from rice straw ash for preparation of eco-friendly hydrophobic silicone coatings

The purpose of this study was to use biomass silicon resources in rice straw to synthesize high value-added organosilicon products to solve the problem of low utilization of rice straw and high pollution and energy consumption in the silicon chemical industry. In this work, spirocyclic alkoxysilane was successfully synthesized by an environmentally friendly method from rice straw ash for the first time. The spirocyclic alkoxysilane yield per gram of rice straw ash can reach up to 1.9 g. Spirocyclic alkoxysilane was used to modify silicone resin coating. This coating can withstand 150 applications of friction and still maintain good hydrophobic effect. The maximum water contact angle after friction can reach 104°. This study broadens the application of rice straw. Furthermore, this research lays the foundation for the improvement of energy-saving and emission reduction process of silicon chemical industry.

Metallic to semiconducting transition and hydrophobicity properties of indium films

Indium films of thicknesses: 38–450 nm were deposited by thermal evaporation on Si substrates by varying the angle of deposition from 0° to 75° and their structural, surface morphology, electrical and wettability properties were characterized. XRD studies confirm the tetragonal structure of all In samples. Films of thickness >100 nm exhibit metallic electrical properties whereas films of lower thicknesses (<100 nm) are semiconducting. XPS studies revealed similar electronic structure of low and high thickness films and that the surface oxidation is found to be greater in high thickness samples. The differences in the electrical transport properties are not due to surface oxidation but due to low dimensionality effects. The water contact angle (WCA) studies showed that In films are strongly hydrophobic and hydrophobicity enhances with an increase in thickness and with the angle of deposition; the enhancement in WCA correlates with an increase in surface roughness. The maximum WCA values of 125° and 131° are found in samples with maximum thickness (450 nm) and film prepared at highest angle of deposition (75°) respectively. It is concluded that the electrical and hydrophobic properties of In films can be significantly tailored by variation in their thickness and angle of deposition.

Multifunctional biomass carbon fiber aerogel based on resource utilization of agricultural waste-peanut shells for fast and efficient oil–water/emulsion separation

In this work, the flexible, ultralight, hydrophobic and multi-functional biomass carbon (BC) aerogel was prepared, and the porous network structure provides efficient oil transmission and storage channels (the porosity of 98.39%). With the extraordinary wettability, the BC aerogel maintains stable hydrophobicity (>135°) and the maximum water contact angle is 141°. BC aerogel exhibits the great reusability of elastic material after multiple intensive compressions. Simultaneously, B-C aerogel holds a wonderful absorption capacity for various oils and organic solvents (27–50 g/g), possessing an extraordinary recyclability (94%). Furthermore, BC aerogel can also be taken as the separation filter of oil/water mixture (1561.19 L m−2 h−1, 99.13%) and used to separate emulsion with relatively stable surface activity (1039.49 L m−2 h−1, 91.93%). The research provides a green strategy for preparing hydrophobic oil-absorbing materials from low-cost materials and has the great application potential in oil–water/emulsion treatment and environmental protection.

Mechanically durable green aerogel composite based on agricultural lignocellulosic residue for organic liquids/oil sorption

Various oil spill cleanup sorbents have good hydrophobicity and oil separation efficiency, but their practical use has been limited due to the difficult and costly fabrication procedure. The research aims towards material development using the consumption of lignocellulosic agricultural residue for isolating cellulose nanofiber and its forward use to construct a 3D porous structure. A simple freeze-drying technique was used to assemble low-density porous structure. The biodegradable polylactic acid coating was used to alter the wettability from hydrophilic to hydrophobic and the maximum water contact angle value was around 120°. The prepared coated samples were testified for a series of oil/organic solvents-water mixtures. The sorption capacity was in the range of 28–70 g/g. The prepared aerogels were efficiently reused for at least 10 cycles. Developed material was used in continuous oil-water separation to remove oil from the water's surface. The cost analysis was estimated for scaleup production in the future.

Enhancing the hydrophobicity of Ti–6Al–4V through multi-level electrical discharge texturing

ABSTRACT In the current work, single and multi-level micro-texturing on Ti–6Al–4V surfaces was performed through electrical discharge micromachining. The wetting properties of the single-level features obtained through EDMM have been studied, which revealed a higher water contact angle (CA) of ∼110° with respect to an untextured surface (water CA ∼38°). The concept of dimples overlapping (% of overlap between adjacent dimples) has been adopted to propose a novel technique for the simultaneous machining of multiple micro-features through a simpler cylindrical tool electrode, which otherwise necessitates multi-step fabrication or preformed tools. Adopting the proposed concept, multi-level textures consisting of micro-dimples surrounded by micro-pillars were machined on the Ti–6Al–4V surface. With multi-level textures, the water CA increases significantly compared to the untextured surfaces. The maximum water CA ∼ 104.2° was obtained with a 300 µm diameter tool and 25% dimple overlap, thereby rendering the surface hydrophobic.

Effect of thermal activation energy on the structure and conductivity corrosion resistance of Cr doped TiN films on metal bipolar plate

Cr doped TiN films were prepared on metal substrates via heating magnetron sputtering at different deposition temperatures (200 °C–350 °C). Vacuum thermal activation energy caused by heating obviously affect the microstructure, hydrophobicity, conductivity and corrosion resistance performance which were systematically investigated. The thickness of the Cr doped TiN films reduced from 573.1 nm to 487.5 nm with the elevating substrate temperature, increasing the films density and hydrophobicity. The maximum water contact Angle is 115.86° and minimum interfacial contact resistance (ICR) is 3.62 mΩ cm2 at 350 °C of which the electrical conductivity completely satisfy with the DOE target (<10 mΩ cm2), indicating a potential application of Cr doped TiN films on stainless steel (SS) for metal bipolar plate.

Synthesis and electrospinning of multiscale‐ordered PLA/LDH@AgGB composite nanofibrous membrane for antibacterial and oil–water separation

AbstractIn recent years, the problem of oily sewage has seriously affected the ecological environment and human health. Thus, we prepared a novel biodegradable poly (lactic acid) (PLA) membrane with antibacterial property and oil–water separation function via electrospinning method. First, the matter of silver ion glass microbeads (AgGB) loaded with layered double hydroxides (LDHs) and the LDH@AgGB modified with 3‐triethoxysilyl‐1‐Propanamine (APTES) were synthesized. Then, the LDH@AgGB were blended with PLA to prepare PLA/LDH@AgGB composite. And the PLA nanofibrous membranes were electrospun. The results showed that APTES could significantly improve the dispersion and compatibility of LDH@AgGB in PLA matrix. The addition of A‐LDH@AgGB could greatly improve the crystallinity, and control the porosity and pore‐size of PLA membranes. The maximum water contact angle of the PLA membranes could reach to 109.31°, while the oil contact angle of the PLA membranes decreased to 0° resulting in a high oil absorption capacity, and fast oil absorption rate performance. Meanwhile, the PLA membrane had efficient antibacterial property against Escherichia coli. The reported novel LDH@AgGB and its PLA composite membrane provided a method for designing and preparing environmental‐friendly, high‐performance materials with both excellent antibacterial property and oil–water separation.

Waterborne polyurethane‐acrylate‐polyaniline: Interfacial hydrogen bonding for enhancing the antistatic, damping, and mechanical properties

AbstractDamping coatings can convert kinetic energy into other forms of energy for consumption and have been widely used for vibration and noise reduction in rail trains, aerospace, automobile industry, and other fields. However, many aspects of damping coating such as, damping, water resistance, heat resistance, mechanical properties and antistatic properties require further improvement. In this study, a low‐cost conductive polyaniline (PANI) with a simple preparation method was dispersed in N‐methyl pyrrolidone and added to waterborne polyurethane‐acrylate (WPUA) hybrid latexes. The interfacial hydrogen bonding increases the interaction force between molecular chains, effectively improve the water resistance, heat resistance, damping, and mechanical properties of WPUA, and endowed WPUA with antistatic properties. Among them, PANI was used as an antistatic medium to be synthesized by chemical oxidation and doped with dodecylbenzene sulfonic acid, and the matrix polymer WPUA was the used of hydroxyethyl methacrylate (HEMA) to combine polyacrylate with waterborne polyurethane (WPU) by chemical bonds. The waterborne polyurethane‐acrylate‐polyaniline (WPUA‐PANI) films were investigated using dynamic light scattering , contact angle measurements , dynamic mechanical analysis, Fourier‐transform infrared spectroscopy (FTIR), digital highresistance meter and other characterization methods. It was concluded that the base latex has good stability, and when the PANI dispersion content was 35%, the comprehensive performance of the WPUA‐PANI films were the best, in which the maximum water contact angle was 106.8°, the tensile strength was increased from 0.7 MPa to 2.3 MPa, the effective damping temperature range (Tanδ ≥ 0.3) was increased from 50 °C to 87 °C, and the resistivity was reduced from 6.41E + 7 Ω·cm to 1.38E + 4 Ω·cm, which had better antistatic properties. This study will promote the development and application of damping coatings.

Flat PVDF Membrane with Enhanced Hydrophobicity through Alkali Activation and Organofluorosilanisation for Dissolved Methane Recovery.

A three-step surface modification consisting of activation with NaOH, functionalisation with a silica precursor and organofluorosilane mixture (FSiT), and curing was applied to a poly(vinylidene fluoride) (PVDF) membrane for the recovery of dissolved methane (D-CH4) from aqueous streams. Based on the results of a statistical experimental design, the main variables affecting the water contact angle (WCA) were the NaOH concentration and the FSiT ratio and concentration used. The maximum WCA of the modified PVDF (mPVDFmax) was >140° at a NaOH concentration of 5%, an FSiT ratio of 0.55 and an FSiT concentration of 7.2%. The presence of clusters and a lower surface porosity of mPVDF was detected by FESEM analysis. In long-term stability tests with deionised water at 21 L h−1, the WCA of the mPVDF decreased rapidly to around 105°, similar to that of pristine nmPVDF. In contrast, the WCA of the mPVDF was always higher than that of nmPVDF in long-term operation with an anaerobic effluent at 3.5 L h−1 and showed greater mechanical stability, since water breakthrough was detected only with the nmPVDF membrane. D-CH4 degassing tests showed that the increase in hydrophobicity induced by the modification procedure increased the D-CH4 removal efficiency but seemed to promote fouling.

A Durable Fluorine‐Free MOF‐Based Self‐Cleaning Superhydrophobic Cotton Fabric for Oil‐Water Separation

AbstractIt is challenging to fabricate durable and fluorine‐free superhydrophobic surfaces through simple procedures. In this study, a novel fabrication method for constructing robust, wearable, and fluorine‐free superhydrophobic surfaces on cotton textiles has been achieved via in situ growth of zeolitic imidazolate framework‐8 (ZIF‐8) layers followed by polydimethylsiloxane (PDMS) modification. The roughness created by the sheet‐like structure is optimized by tuning the mole ratio between 2‐methylimidazole and zinc nitrate during the in situ growth, while polydopamine (PDA) is introduced to improve the durability and stability. The resultant PDA/ZIF‐8/PDMS@cotton fabric exhibits a maximum water contact angle of 156.4° and a low sliding hysteresis angle of 3.8°. The as‐prepared superhydrophobic fabric also presents excellent durability and stability, and outstanding resistance against continuous sunlight exposure and various chemical reagents. In addition, the superhydrophobic surface possesses excellent self‐cleaning and anti‐fouling performance, as well as high separation efficiency &gt;97% and reusability when serving as a filter during the oil‐water separation. The proposed approach and prepared superhydrophobic fabric strongly demonstrate the potential applications in oil‐water separation with a prolonged life cycle.

Treatment of Polymeric Films Used for Printed Electronic Circuits Using Ambient Air DBD Non-Thermal Plasma.

This study aims to present the properties of the polymeric films after being subjected to DBD plasma treatment in atmospheric conditions. Three different commercial films of polyester (Xerox Inkjet transparencies and Autostat CUS5 Clear film) and polycarbonate (Lexan™ 8010 MC) have been considered for the tests. The surface wettability has been evaluated based on static water contact angle (WCA) for different treatment times varying between 0.2 s and 30 s, the results revealing a maximum WCA decrease compared to a pristine of up to 50% for Xerox films, 75% for Autostat and 70% for Lexan. The persistence of the hydrophilic effect induced by the plasma treatment has also been verified for up to 72 h of storage after treatment, the results indicating a degradation of the treatment effects starting with the first hours after the treatment. The WCA stabilizes to a value inferior to the one corresponding to pristine in the first 24 h after plasma treatment. The adhesion forces, as well as preliminary surface morphology evaluations have been determined for the considered films using atomic force microscopy (AFM). The adhesion forces are increased together with the prolongation of the plasma treatment application time, varying from initial values of 165 nN, 58 nN and 204 nN to around 390 nN, 160 nN and 375 nN for Xerox, Autostat and Lexan films, respectively, after 5 s of DBD treatment. For the considered materials, the results revealed that the plasma treatment determines morphological changes of the surfaces indicating an increase in surface roughness.

Optimal condition for fabricating mechanically durable superhydrophobic titanium surface by rapid breakdown anodization: Self cleaning and bouncing characteristics

In this paper, we describe a simple, cost effective, fast, scalable and sustainable method for fabrication of mechanically durable superhydrophobic (SHP) surface of titanium by a rapid breakdown anodization (RBA) followed by molten stearic acid (MSA) chemical modification. In this new approach, the preparation time is only a minute. Instead of stearic acid- ethanol solution, molten stearic acid is the post surface modification, which made the preparation process rapid and simple. The anodized samples showed islands of TiO2 microclusters with complex hierarchical structures with nano pores uniformly distributed in the passive TiO2 matrix. Laser Raman spectroscopy (LRS) analysis revealed the TiO2 microclusters are polycrystalline in nature. The applied voltage, anodization time, immersion time and MSA bath temperature are optimized to obtain a robust mechanically durable SHP surface. FESEM images showed that both anodization and immersion parameters have significant effect on the surface morphology of microclusters. A maximum water contact angle (WCA) of 167.8° with a sliding angle of 6° was obtained for a Ti sample anodized at 50 V for 10 min after molten stearic acid immersion at 125 °C for 30 min. The prolonged anodization for 10 min promoted microcluster growth in all dimensions to form a highly hierarchical micro-nanostructure. The prepared samples showed vertical micro plate-like crystals of stearic acid on the micro clusters, which enhanced the very high WCA. The FTIR results revealed multiple bonding modes of stearic acid with TiO2 microclusters through surface hydroxyl groups. The prepared superhydrophobic samples showed excellent self-cleaning and abrasion resistance.

Superhydrophobic graphene/ceramic templates for the preparation of particulate drugs

This paper proposes the use of superhydrophobic graphene/ceramic templates fabricated through laser texturing and patterning for the preparation of particulate drugs. A nanosecond pulse fiber laser was used to texture a graphene film coated on ceramic substrates for obtaining a superhydrophobic surface. Then, laser patterning was conducted on the laser-textured surface to define the diameter of the prepared particulate drugs. Laser-textured graphene/ceramic substrates with a laser areal fluence of 17.51 J/cm 2 and a hatch distance of 0.01 mm exhibited a maximum water contact angle of 151.5°. This result was obtained because the laser-textured graphene films contained coral reef structures with nanoscale pores. Raman analyses indicated that the intensities of the G and 2D bands gradually decreased after the laser texturing and patterning processes. Moreover, the sheet resistance of the laser-textured and laser-patterned graphene films was larger than that of untextured ones because the thickness of the graphene films was reduced through laser thinning. The maximum heating temperature of the graphene-based heater was 140 °C for an input direct current voltage of 36 V. In addition, graphene-based self-heating devices were developed and successfully used to dry liquid roflumilast.

UV-curable self-matting waterborne polyurethane acrylate coating via self-wrinkled surface during curing in open-air.

This study developed and evaluated a series of ultraviolet (UV) curable self-matting waterborne polyurethane acrylate (UV-WPUA) coatings based on the self-wrinkled surface during UV-curing in the open-air. This method is simple, efficient, eco-friendly, and it does not require complicated or expensive equipment. The FT-IR spectrum indicates that the peaks of C[double bond, length as m-dash]C in UV-WPUA have disappeared after UV irradiation. The gloss value of the UV-WPUA cured film can be affected by the wrinkles on the surface of the film and adjusted it by controlling the content of the photoinitiator in the liquid coating, since the content influences the dimensions of the wrinkles. As the height of the wrinkle increased, the gloss value of the UV-WPUA cured film decreased, and when the incident angles are 20° and 60°, the gloss values are less than 3 GU and 5 GU, respectively. Moreover, the cured film has a maximum water contact angle of 109°, which is affected by wrinkles and positively correlated with the surface roughness of the film. Furthermore, the cured film has excellent properties of thermal stability, tensile strength, pencil hardness, cross-cut adhesion and resistance to abrasion properties, making it well suited for the furniture, leather, and textile applications.

Fabrication of superhydrophobic & catalytic bifunctional MnO2 @ Al2O3 composite ceramic membrane for oxidation of desulfurization waste solution

A novel superhydrophobic & catalytic bifunctional MnO2@Al2O3 composite ceramic membrane was prepared, and characterized for catalytic oxidation of sulfite through membrane aeration. Manganese dioxide on the ceramic membrane was fabricated via the hydrothermal synthesis method with ammonium persulfate and manganese sulfate. The three-dimensional structure and rough surface were formed by the staggered spines of sea urchins-like MnO2 particles. Stearic acid was used as the hydrophobic modifying reagent to reduce surface free energy. The synthesized composites exhibit excellent superhydrophobicity with a maximum static water contact angle of 164.9° ± 5.3°. The reaction parameters could affect the hydrophobicity by changing the morphology of MnO2. The bifunctional membrane could also promote the oxidation rate of sulfite, which was increased by 44.0% in Na2SO3 solution and 64.2% in (NH4)2SO3 solution.

Deposition of Super-Hydrophobic Silver Film on Copper Substrate and Evaluation of Its Corrosion Properties

A simple and versatile chemical solution deposition process is reported to manipulate the wettability properties of copper sheets. The whole process has the advantage of being time-saving low cost and environment-friendly. An adherent silver coating was achieved under optimal conditions. Scanning electron microscopy and X-ray diffraction were used to examine the silver film structure. A confocal microscope was used to record the 3D topography and assess the film roughness of the surface. A dual morphology was revealed, consisting of broad regions with feather-like structured morphologies and some areas with spherical morphologies. Such silver-coated copper samples exhibited a sufficiently stable coating with superhydrophobicity, having a maximum water contact angle of 152°, along with an oleophilic nature. The corrosion behavior of the produced hydrophobic copper under optimal conditions was evaluated by means of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) using a 3.5% NaCl solution. The corrosion protection mechanism was elucidated by the proposed equivalent circuits, indicating that the superhydrophobic silver coating acted as an effective barrier, separating the Cu substrate from the corrosive solution. The superhydrophobic coating demonstrated enhanced anti-corrosion properties against NaCl aqueous solution in relation to the copper substrate as indicated from both EIS and potentiodynamic polarization experiments.