bisphenol-A Epoxy Research Articles

Reinforcement of Bisphenol-A epoxy resin nanocomposites with noncovalent functionalized and physical adsorption modified CNTs

The depolymerization of carbon nanotubes (CNTs) and dispersion of CNTs in polymer matrix are key to study the application properties of CNTs. We described using the aniline trimer (AT) as a noncovalent dispersant agent and the polyoxyethylene octyl phenyl ether (Triton X-100) as a nonionic surfactant to treat CNTs. UV–vis spectra showed the successful combination of two dispersants and CNTs. Scanning electron microscopy (SEM) analysis showed the dispersion effect was best when the mass ratio of AT to Triton X-100 was 1:1. And we described the preparation of treated-CNTs loaded bisphenol-A epoxy (E44) nanocomposites. We analyzed the fracture surface of nanocomposites by SEM analysis and analyzed the dispersion of CNTs in epoxy matrix by transmission electron microscopy (TEM) analysis. The mechanical properties of neat epoxy resin, raw CNTs loaded epoxy nanocomposites and treated-CNTs loaded epoxy nanocomposites were assessed. The tribological properties and thermodynamic properties of neat epoxy resin and treated-CNTs loaded epoxy nanocomposites were evaluated. The mechanical properties and the tribological properties of the treated-CNTs loaded epoxy nanocomposites were all improved. DSC showed loading treated-CNTs increased the glass temperature. TGA and DTG showed that the thermal stability of nanocomposites was not influenced by loading treated-CNTs.

DGEBA‐polyaminoamide as effective anti‐corrosive material for 15CDV6 steel in NaCl medium: Computational and experimental studies

ABSTRACTThe present study is focusing on evaluating theoretically and experimentally stability and type of interactions between the epoxy resin bisphenol A diglycidyl ether (DGEBA)‐polyaminoamide anticorrosive coating and high strength low alloy steel surface 15CDV6. The coated steel samples were subjected to a harsh environment of an electrolyte solution of 3 wt % NaCl to simulate the corrosive marine environment. The performance of the epoxy coating was investigated using electrochemical impedance spectroscopy (EIS). The EIS results revealed the occurrence of some deterioration in the film after subjecting it to a harsh environment for 4392 h, because the impedance of the coating dropped by about 1.4 kΩ.cm2. Surface morphological study of metallic specimens before and after exposing to the simulated marine environment (3 wt % NaCl) was carried out using scanning electron microscopy, energy dispersive spectroscopy (EDS), and optical microscope (OM) methods. The interactions between DGEBA‐polyaminoamide and the metallic surface were further carried out using computation modeling such as density functional theory (DFT)‐based quantum chemical calculations, Monte Carlo (MC), and molecular dynamics (MD) simulations. Results showed that DGEBA‐polyaminoamide possesses a strong tendency to adhere and inhibits the corrosive dissolution of 15CDV6 steel surface in the stimulated marine environment. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48402.

Dual Component Polymeric Epoxy-Polyaminoamide Based Zinc Phosphate Anticorrosive Formulation for 15CDV6 Steel

The present research is focused on a formulation with two active components as an anticorrosive polymer coating for 15CDV6 steel. The dual component formulation (epoxy-zinc phosphate (ZP) coating) consists of a polymeric epoxy resin Bisphenol A diglycidyl ether (DGEBA) cured with a polyaminoamide as a first component and zinc phosphate (Zn3(PO4)2(H2O)4) (ZP) added in 5% by weight as a second component. The anticorrosive performance of the epoxy-ZP coating was evaluated against the standard coating, which consists of only one component, the cured polymeric epoxy resin. The two polymer coatings were evaluated by electrochemical impedance spectroscopy (EIS). The surface morphology was of the two polymer coatings were characterized by scanning electron microscopy (SEM). The coated samples of 15CDV6 steel were tested in a harsh environment of corrosive electrolytes (3 wt % NaCl solution). Under these conditions, a very high impedance value was obtained for 15CDV6 steel coated with the epoxy-ZP coating. Even after exposure for a long period of time (5856 h), the performance was still acceptable, indicating that the epoxy-ZP coating is an excellent barrier. The standard epoxy coating provided an adequate corrosion protection performance for a short period of time, then the performance started to decline. The results were confirmed by surface characterization, a cross-sectional image obtained by optical microscopy for an epoxy-ZP coating applied on 15CDV6 steel exposed for 5856 h to a salt spray test showed that the coating is homogeneous and adheres well to the surface of the steel. So, the coating with a dual component could have great potential in marine applications as anticorrosive for steel.

Preparation and characterization of dimer fatty acid epoxy-acrylate resin hybrid emulsion for photocurable coatings

UV-curable epoxy acrylate oligomer was synthesized via one-pot and two-step method by the ring-opening reaction of bisphenol-A epoxy resin (DGEBA) with dimer acid (DA) and acrylic acid (AA) in this paper. The molecular chain was firstly extended with DA. Then, AA, as a blocking agent, played the role in introducing unsaturated bonds to the chain. The water-based dispersion of epoxy acrylate was fabricated by subsequent phase-inversion emulsification in the presence of methacryloxypropyl silsesquioxane (MASQ). Compared with the traditional UV-curable epoxy acrylate, emulsions contain much less volatile organic compounds (VOC), which are more widely used in the coating industry. Because of the introduction of unsaturated bonds, MASQ participated in free-radical polymerization when incurred by UV, resulting in a better compatibility with epoxy acrylate. The cured samples were characterized with dynamic thermomechanical analysis (DMA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and contact angle measurement (CA). The results indicated that the thermal property, flexibility, and water resistance all improved with the increasing proportion of DA, which may contribute to the long hydrophobic chain. Besides, the organic-inorganic and cage-like structure of MASQ also contributed to the enhancement of thermal property, water resistance, glass transition temperature, and storage modulus. With the above favorable properties and performances, the dimer fatty acid epoxy-acrylate resins will demonstrate promising applications in waterborne coatings.

A Visible-Light Curing system of Diphenyliodonium Salt/BODIPY dyes/Bisphenol-A Epoxy Resin Under Halogen Lamp

Bisphenol-A epoxy resin have attracted much attention due to its good mechanical properties after curing. In this paper, a visible light curing system of bisphenol-A epoxy resin (E51) initiated by diphenyliodonium hexafluorophosphate (IOPF) and boron dipyrromethene-based (BODIPY) photosensitizers (BODIPY-1 and (BODIPY-2) under a halogen lamp (380-580 nm) was investigated. BODIPY dyes are well known long-wavelength photosensitizers, which is good for IOPF to expand absorption to visible light region. BODIPY-1 and BODIPY-2 are intermediates that reported in our previous work. When IOPF/BODIPY-1 is 2wt%/1wt%, E51 achieves epoxy conversion up to 60% in 0.18 mm thick molds. The Illumination of the halogen lamp is as low as 25.0 mW/cm2. Under same condition, the epoxy conversions of IOPF/BODIPY-2/E51 and IOPF/E51 are about 50% and 20%. When filters were used, IOPF/BODIPY/E51 was effectively cured under light irradiation of 460 nm and 540 nm, and only IOPF is not able to initiate E51 at these wavelengths.

Dielectric and flash DSC investigations on an epoxy based nanocomposite system with MgAl layered double hydroxide as nanofiller

Nanocomposites based on MgAL layered double hydroxides (LDH) and an epoxy resin were prepared and investigated by a combination of complementary methods. As epoxy resin Bisphenol A diglycidyl ether (DGEBA) was used with Diethylenetriamine as curing agent. The LDH was modified with taurine, which acts as an additional crosslinking agent due to its amine groups. The epoxy resin was cured in a presence of the nanofiller, which was added to the system in various concentrations. X-ray scattering, by combination of SAXS and WAXS was used to characterize the morphology of the obtained nanocomposites. These investigations show that the filler is distributed in the matrix as small stacks of ca. 10 layers. The molecular dynamics of the system, as probe for structure, was investigated by broadband dielectric spectroscopy. In addition to the β- and α-relaxation (dynamic glass transition), characteristic for the unfilled materials, a further process was found which was assigned to localized fluctuations of segments physically adsorbed or chemically bonded to the nanoparticles. The dielectric α-relaxation is shifted to higher temperatures for the nanocomposites in comparison to the pure material but depends weakly on the content of nanoparticles. Further, for the first time Flash DSC was employed to a thermosetting system to investigate the glass transition behavior of the nanocomposites. The heating rates were converted in to relaxation rates. For low concentrations of the nanofiller the thermal data overlap more or less with that of the pure epoxy. For higher concentrations the thermal data are shifted significantly to higher temperatures. This is discussed in terms the cooperativity approach to the glass transition.

Epoxy nanocomposites significantly toughened by both poly(sulfone) and graphene oxide

Abstract Toughening of brittle epoxy (EP) resins is important to widen their applications. In this work, both polysulfone (PSF) as thermoplastic toughening agent and graphene oxide (GO) as nanofiller toughening agent are employed to toughen diglycidyl ether of bisphenol-A (DEGBA) epoxy resin. PSF and GO are added to EP via melt blending and solvent mixing method, respectively. Pure epoxy resin is brittle with a fracture toughness ( K I C ) of ca. 0.99 MPa . m 0.5 . Dual toughening by the simultaneous addition of PSF and GO significantly enhances the fracture toughness of the epoxy resin. The GO/PSF/EP ternary nanocomposite with 5 phr PSF and 0.2 phr GO shows the maximum value of ca. 1.88 MPa . m 0.5 with an increase of 89.90% in K I C compared to that of neat epoxy. Meanwhile, the elongation at break is also greatly enhanced by the addition of PSF and GO. Moreover, the tensile strength , Young's modulus and thermal stability are slightly enhanced and glass transition temperature is maintained after PSF and GO are introduced into EP resin. The current strategy of using both PSF and GO as dual toughening agents is promising for effectively toughening epoxy resins without sacrificing tensile and thermal properties.

Control of nanostructures and fracture toughness of epoxy/acrylic block copolymer blends using in situ manipulation of the epoxy matrix reaction type

The effect of small amounts of curing catalysts on the nanostructures and mechanical properties of epoxy/acrylic block copolymer blends were investigated. Poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly (methyl methacrylate) (PMMA-b-PnBA-b-PMMA) triblock copolymer (acrylic BCP) was blended with diglycidyl ether of bisphenol-A epoxy thermosets. The blends were cured using phenol novolac (PN) with curing catalysts at less than 1 wt%. Three different curing catalysts, triphenylphosphine (TPP), 2,4,6-tris(dimethyl amino methyl)phenol (DMP), and 1,2-dimethylimidazole (DMIz), were compared. A polyol-type linkage structure was formed in the cured epoxy matrix using TPP, whereas both polyether-type linkage structure and polyol-type linkage structure were formed when DMP and DMIz were used. As a result, different nanostructures were formed in response to the different linkage structures in the epoxy matrix originated from the same blend composition of epoxy/acrylic BCP/PN. The TPP catalyst gave a spherical nanostructure, while the DMP and DMIz catalysts gave branched cylindrical nanostructures in the epoxy/acrylic BCP/PN blends. The compatibility of the PMMA-block chains of the acrylic BCPs to the cured epoxy matrix was a key factor that determined the nanostructures. The fracture toughness of the cured blends was dependent on both the nanostructures in the blends and the ductility (extent of cross-linking density) of the epoxy matrix.

Free volumes introduced by fractures of CFRP probed using positron annihilation

A void formation at nanoscale and a crack initiation at micrometer scale in CFRP during a tensile test were investigated by means of positron annihilation and X-ray computed tomography (X-CT). Free volumes in bisphenol-A epoxy resin in CFRP were probed, and a mean diameter of free volumes at room temperature was determined to be 0.49 nm. The crack initiation and propagation in the CFRP sample was observed by in-situ measurements of X-CT during a tensile test. For the sample after the tensile test, free volumes with a mean diameter of 0.70 nm were introduced near fractures locations. In the same locations, the density of free volumes which intrinsically existed in the polymer resins decreased. Thus, the introduction of the free volumes was attributed to breaks in molecular chains upon fracture and a resultant agglomeration of intrinsic free volumes in the polymer matrix.

GO/rGO as Reinforcing Nanofiller in Carbon Fiber/Epoxy Resin Composite Systems

Interfacial interactions between matrix and reinforcement of composites influences greatly in final properties of the material. Carbon Fibers are characterized for to have low interactions with resins when forming a composite material. In the present study, 0.3 wt% of GO/rGO were incorporated in three systems of epoxy resin/carbon fiber as reinforcing fillers, trying to profit the chemical affinity between aromatics structures of GO/rGO and polar interactions with epoxy resin. GO/rGO were characterized by XPS, TGA was performed on carbon fiber, epoxy resins and composites obtained and SEM was utilized to observe composite samples in detail once mechanical tests were conducted. Composites experienced noticeable enhancements by employing Bisphenol Epoxy (BP) cured with methyl cyclohexane-1,2-dicarboxylic anhydride (MCHDA) as matrix and carbon fiber of 300 g/cm2 as reinforcement; Youngs modulus, rupture stress and elongation to fail- ure increased almost twofold compared to non-modified composites by adding GO in the system and even superior boosts can be appreciated with rGO, which additionally improves the flexural stress from 14.6 to 30.1 GPa

Synergistic effect of basalt fiber on the thermal properties of intumescent fire retardant coating

Abstract This research work presents the enhancement of thermal performance of intumescent fire-retardant coatings (IFRCs) to investigate the synergistic effects of novel type of fiber reinforcement (basalt fibers) towards heat shielding capability for steel structures. The coating basis consists of bisphenol-A epoxy resin (NPEL-128) cross-linked with polyamide amine (ACR Hardener (H-2310)), mixed with expandable graphite (EG), ammonium polyphosphate (APP), melamine and boric acid. Various formulations with different fiber loading were synthesized and characterized. Bunsen burner test in accordance to UL-1709 was performed to examine their fire retardant properties. Moreover, furnace test was carried out to investigate the char expansion. The results showed that 2 wt% basalt fibers (IFRC-B2) greatly enhanced the heat insulation performance, the steel plate backside temperature reaching 187°C after 1-h fire test compared to 375°C for the control formulation (CF) without fiber reinforcement. Char expansion measurements carried out after furnace test show that in the presence of basalt fibers the expansion of IFRC-B2 was twice that of CF. Char was also analyzed by Field Emission Scanning Electron Microscopy (FESEM). Micrographs revealed deep cracks on CF char surface, allowing the heat to diffuse more rapidly and explained the poor fire performances. The char of IFRC-B2 was smooth and dense, while distribution of basalt fibers and char cells were homogenous, with presence of small voids of about similar size, which limited heat transfers. Thermogravimetric analyses (TGA) in pyrolysis conditions showed that residual weight increases by 10 wt%, confirming the increase in thermal stability of the basalt containing formulation.

Investigation of isothermal and dynamic cure kinetics of epoxy resin/nadic methyl anhydride/dicyandiamide by differential scanning calorimetry (DSC)

Isothermal and dynamic differential scanning calorimetry (DSC) was exploited to study the curing behavior of diglycidyl ether bisphenol-A epoxy resin with various combining ratios of dicyandiamide (DICY) and nadic methyl anhydride (NMA). Curves of prepared samples indicated that the enthalpy of the reaction decreased with increasing the molar ratios (NMA/DICY) up to 40% after which an exothermic peak peculiar to the effect of anhydride appeared at a higher temperature. The curing behavior examination of the samples containing the aforementioned molar ratio of NMA/DICY (= 40%) was carried out using isothermal condition at different temperatures (130–145 °C) and dynamic condition DSC at various heating rates (2.5–20 °C min−1). Under the isothermal condition, by constructing a master curve, the values of activation energy (Ea) and pre-exponential factor (A) were calculated 89.3 kJ mol−1 and 1.2 × 10+9 s−1, respectively. The activation energy of the curing reactions in a dynamic mode was obtained 85.32 kJ mol−1 and 88.02 kJ mol−1 using Kissinger and Ozawa methods, respectively. Likewise, pre-exponential factors were also calculated 3.35 × 10+8 and 7.4 × 10 +8 s−1, respectively. The overall order of reaction for both conditions was found to be a value around 3.

Effects of conjugation on the properties of alkynylcarbazole compounds: experimental and theoretical study

Four novel dyes containing alkynylcarbazole, namely, 2-((9H-carbazol-3-yl)ethynyl)-9-ethyl-9H-carbazole, 3,6-bis((9-ethyl-9H-carbazol-2-yl)ethynyl)-9H-carbazole, 3-(phenylethynyl)-9H-carbazole and 3,6-bis(phenylethynyl)-9H-carbazole, were synthesized on the basis of single and double substitutes by following the Sonogashira coupling method. The synthesized dyes were then assessed as novel photosensitizers in visible-light photopolymerization to evaluate the effects of conjugation on the properties of aromatic compounds. A comparison between UV–vis and TD/DFT electron transition spectra shows that \(\lambda _{\mathrm{max}}\) in theoretical ultraviolet spectra matched well with the experimental spectra; every conjugated alkynylcarbazole dye exhibits a wide absorption band in the range of 300–400 mm. Moreover, conjugation enhancement by switching carbazoleacetylene moieties caused a red shift in the absorption bands. The theoretical study showed that the maxima \(\lambda \) of these molecules ranged from \(\sim \)330 to 370 mm, corresponding to \(\pi {\rightarrow }\pi ^{*}\) and \({n}{\rightarrow }\pi ^{*}\) electron transitions. Fluorescence spectroscopic data show that the strongest emission peaks exhibit a red shift because of the addition of conjugated acetylene groups. A combination of alkynyl dyes and iodonium under a halogen lamp atmosphere by visible-light photopolymerization displayed a positive response to the cationic polymerization of bisphenol-A epoxy resin A and free-radical polymerization of tripropylene glycol diacrylate.

Curing kinetics of diglycidyl ether of Bisphenol-A epoxy system using a tertiary amine, through the study of its rheometric characteristics

The curing reaction of the epoxy system “diglycidyl ether of bisphenol-A” (DGEBA) and the tertiary amine “2-[(2-dimethyl-amino)-ethoxy] ethanol” (DMAE), with different DMAE concentrations was studied by means of rheometric analysis using the Rubber Process Analyzer (RPA). A novel simple technique was introduced in order to allow the use of the RPA instrument in measuring the curing studies of quasi liquid reactants. It was found that the crosslinking degree; as measured by: a)- the maximum torque in the RPA analysis as well as by b)- the estimated molecular weight between crosslinks (Mc); increased with the DMAE concentration. Also, it was found that the curing reaction rate, increased with the DMAE concentration; greatly decreasing the time to gel point as well as the time to maximum torque. The degree of crosslinking, as taken from the crosslink density or by the molecular weight between crosslinks, increases roughly seven times as the tertiary amine (DMAE) concentration increases from 3 to 10 wt%. The activation energy of the crosslinking reaction was determined by plotting as an Arrhenius type equation, the log(Geltime) -vs- the inverse temperature, and it was found to be around 42.9 kJ/mol.

Physico-Chemical Characterization of Two Epoxy Systems Using Porphyrins as Curing Agents

Chlorophyllin and meso-tetra(4-carboxifenyl)porphyrin have been used as crosslinking agents for curing the epoxy resin of bisphenol A diglycidyl ether. Monitoring reaction by DSC revealed two peaks on calorimetric scans show. FTIR corroborates that the first signal corresponds to an esterification reaction while the second one is due to an etherification one. Thermodegradation temperatures show that the signals obtained by calorimetry do not correspond to decomposition processes.

High barrier performance of the multilayer film based on epoxy and montmorillonite

A flexible organic device needs a protective encapsulating layer to resist degradation of the device due to environmental oxygen and moisture. The performance of organic devices degrades with time due to a self-process of delamination and oxide formation of the cathode by environmental oxygen and moisture for electrochemical processes. Here, a flexible multilayer barrier film, which is a sandwiched composite layer with organic layers, has been fabricated in an inexpensive way under atmospheric conditions using an applicator on PET substrate. An organic layer (POL) consists of bisphenol A-type phenoxy resin and epoxy resin. For the middle composite layer (MMT), a composite with montmorillonite has been used as an interactive barrier. The multilayer film with ball-milled montmorillonite 2% composite layer shows lower moisture permeation rate of 2.850 × 10−2 gm−2day-1 than only POL on PET substrate. Fabrication of flexible multilayer barrier film from solution has promising industrial prospects due to facile processing at low temperatures.

Improving the multifunctionality of structural supercapacitors by interleaving graphene nanoplatelets between carbon fibers and solid polymer electrolyte

Novel structural supercapacitors, containing graphene nanoplatelets incorporated carbon fiber mats as electrodes, crosslinked diglycidylether of bisphenol-A epoxy polymer electrolyte and filter paper separator, have been manufactured for the first time by vacuum-assisted resin transfer molding process. These supercapacitors can bear structural loads and store electrochemical energy at the same time. Loading of high surface area graphene nanoplatelets on carbon fiber mats is an effective process to improve the charge storage capacity of the electrodes. Electrochemical and structural properties of the structural supercapacitors are explored through in-plane shear testing, dynamic mechanical thermal analysis, chronoamperometry and impedance spectroscopy, respectively. As graphene nanoplatelet loadings on carbon fiber mat electrodes increase from 0 to 10 wt.%, the structural supercapacitors exhibit significant improvements in specific capacitance (8.9–118.7 mF·cm−3), energy density (19.7–263.8 Wh·m−3) and normalized in-plane shear modulus (1.7–3.1 GPa). Thus, this study has revealed that using the graphene nanoplatelet loaded carbon fiber mats as structural supercapacitor electrodes is a relatively novel and easy approach to enhance the multifunctionality of structural supercapacitors.

Investigation of thermal behavior of energetic and non-energetic binders on luminous efficiency of high performance miniature flares

Abstract Miniature flares containing magnesium/sodium nitrate compounded with different binders were studied for increasing luminosity and luminous efficiency in various fuel oxidizer ratio and flare diameters. Unsaturated polyester, Bisphenol-A epoxy resin, calcium resinate, and nitrocellulose were used as binders for construction the flares. Experimental results showed that luminous efficiency was higher for polyester based flares. Due to the difference in decomposition progress of various binders and the exothermic reaction between binder and oxidizer the luminous efficiency of the mixtures were 31000, 28900, 27800 and 25100 cd respectively for polyester, epoxy, calcium resinate, and nitrocellulose. It was found that nitrocellulose as an energetic binder produces the highest light intensity in comparison to other binders, but the burning rate is higher and the burning time is lower than the other binders. Thermal analysis of four binders showed that the heat of reactions was directly related to the amount of light output and luminosity.

Antibacterial and antifouling performance of bisphenol-A/Poly(ethylene glycol) binary epoxy coatings containing bromine-benzyl-disubstituted polyaniline

Polyaniline (PANI), benzyl-substituted polyaniline (BP) and bromine-benzyl-disubstituted polyaniline(BBP) were prepared and characterized by scanning electron microscope (SEM), Fourier transform infrared (FT-IR), UV–vis absorption spectra, wettability test and thermogravimetric Analysis (TGA). It is noted that BBP nanoparticles has high antibacterial activity against both Gram-negative E. coil and Gram-positive B. subtilis while PANI and BP do not have obvious antibacterial activity. The bisphenol-A/Poly(ethylene glycol) binary epoxy coatings (BAE/PEGE) containing BBP were prepared using cardanol-based phenalkamine as curing agent. The prepared coatings were evaluated by wettability test, optical microscope, AFM, SEM, TGA, antibacterial and antifouling tests. The results demonstrate that the prepared coatings with PEGE and BBP exhibits improved antibacterial and antifouling performance comparing with pure bisphenol-A epoxy coating. The combination of fouling release effect of BAE, fouling resistance function of PEG and sterilization function of BBP is a promising strategy to improve the antibacterial and antifouling performance of prepared coating surfaces.

Anticorrosive Performance Approach Combining an Epoxy Polyaminoamide–Zinc Phosphate Coatings Applied on Sulfo-tartaric Anodized Aluminum Alloy 5086

This study focused on developing an effective anticorrosive formulation for selected sulfo-tartaric anodized aluminium alloy (Al-alloy AA5086) to withstand harsh marine environment. The developed formulation was based on an epoxy resin bisphenol A diglycidyl ether (DGEBA) that is cured with polyaminoamide. Two sets of coated Al-alloy AA5086 samples were prepared using the epoxy resin formulation; a standard and ER–EZ. The formulation for making the ER samples included zinc phosphate (ER–ZP). Zinc phosphate was added to the formulation in about 5 wt%. The coated samples of Al-alloy AA5086 were evaluated by exposing them to a salt spray test chamber for various periods of time. The test was carried out according to an ISO 7253 standard test. The anticorrosive performance of the two epoxy coatings, the standard and ER–ZP were monitored by an electrochemical impedance spectroscopy (EIS). According to the EIS results, ER–ZP exhibited superior anticorrosive performance. The surface morphology analysis of the ER–ZP sample as shown by scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS) stayed smooth with minor roughness even after exposure to the harsh environments for 4392 h. The Bode and Nyquist plots showed that the ER–ZP coating has an outstanding barrier property in protecting Al-alloy AA5086 in marine environment against corrosion. The superior performance of the ER–ZP could be attributed to the presence of zinc phosphate which enhanced the adhesion properties of the coating and made it a more effective barrier.