Effect of amino acids and montmorillonite nanoparticles on improving the corrosion protection characteristics of hybrid sol-gel coating applied on AZ91 Mg alloy

Ashassi-Sorkhabi, Habib; Moradi-Alavian, Saleh; Jafari, Reza; Kazempour, Amir; Asghari, Elnaz

doi:10.1016/j.matchemphys.2018.12.059

Cited by 55 publications

(14 citation statements)

References 49 publications

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“…where C represents the capacity, CPE is the non‐ideal capacity, R is the resistance, and n is a capacity factor …”

Section: Resultsmentioning

confidence: 99%

“…where C represents the capacity, CPE is the non-ideal capacity, R is the resistance, and n is a capacity factor. [29][30][31] From the impedance diagrams, the coating resistance (R coat ) was estimated to evaluate the protection performance of coatings. The obtained data from the interpretation of the impedance spectra are reported in Table I.…”

Section: Eis Measurementsmentioning

confidence: 99%

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

Dagdag

Berisha

Safi

et al. 2019

J of Applied Polymer Sci

117

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The 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.

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“…where C represents the capacity, CPE is the non‐ideal capacity, R is the resistance, and n is a capacity factor …”

Section: Resultsmentioning

confidence: 99%

Section: Eis Measurementsmentioning

confidence: 99%

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

Dagdag

Berisha

Safi

et al. 2019

J of Applied Polymer Sci

117

View full text Add to dashboard Cite

show abstract

“…The latest research studies demonstrate that the incorporation of functional nanoparticles can combat and even prevent the corrosion occurrence and are also capable of enhancing the lifetime of the coating. Nanostructures such as silicon dioxide (SiO 2 ) [24,25], carbon nanotubes (CNT) [26,27], zinc oxide (ZnO) [28,29], zirconium dioxide (ZrO 2 ) [30], gold nanoparticles [31], silver nanoparticles [32], cerium dioxide (CeO 2 ) [33], titanium dioxide (TiO 2 ) [34], montmorillonite nanoparticles (MMT) [35], graphene oxide (GO) [36], and cerium oxyhydroxides (Ce-H 2 O 2 ) [37] are some examples of active agents that were investigated for their anti-corrosion properties.…”

Section: Of 15mentioning

confidence: 99%

Recent Advances in Graphene Oxide-Based Anticorrosive Coatings: An Overview

Necolau

Pandele

2020

Coatings

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The present review outlines the most recent advance in the field of anticorrosive coatings based on graphene oxide nanostructures as active filler. This carbonaceous material was extensively used in the last few years due to its remarkable assets and proved to have a significant contribution to composite materials. Concerning the graphene-based coatings, the synthesis methods, protective function, anticorrosion mechanism, feasible problems, and some methods to improve the overall properties were highlighted. Regarding the contribution of the nanostructure used to improve the capability of the material, several modification strategies for graphene oxide along with the synergistic effect exhibited when functionalized with other compounds were mainly discussed.

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“…For these reasons, a surface treatment of magnesium alloys is almost mandatory in order to improve its corrosion resistance and thereby extend its use to other applications. Among many surface treatments for magnesium and its alloys [12][13][14][15], the development of anodic films on the surface emerge as a fine option. The procedure known as plasma electrolytic oxidation (PEO), allows the development of anodic layers with controlled chemical composition and morphology.…”

Section: Introductionmentioning

confidence: 99%

New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B

Toro

Zuleta

Correa

et al. 2020

Mater. Res. Express

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In this work, anodic oxide layers on the surface of an AZ31 magnesium alloy were obtained by plasma electrolytic oxidation (PEO) process under low frequency pulsed current. For this, electrolytical solutions containing hexamethylenetetramine and sodium fluoride were used. The morphology and chemical composition of formed coatings were examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Also, salt spray test, hydrogen evolution and electrochemical tests (potentiodynamic polarization and electrochemical impedance spectroscopy) were conducted in order to study the corrosion behavior of the coated samples. It was found that the use of low frequency pulsed current for the PEO process reduces the film porosity and increases its thickness, compared with PEO films obtained by continuous anodization. The effect of the pulsed current signal was also analyzed for a two steps PEO process, observing changes in the morphological characteristics of the coatings which allow a better corrosion according electrochemical tests (short term corrosion measurements). However, long term tests results as hydrogen evolution and salt spray tests, indicated the opposite. Both the film porosity and thickness were affected by either the pulsing of the current or the use of a two-step process.

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Effect of amino acids and montmorillonite nanoparticles on improving the corrosion protection characteristics of hybrid sol-gel coating applied on AZ91 Mg alloy

Cited by 55 publications

References 49 publications

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

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

Recent Advances in Graphene Oxide-Based Anticorrosive Coatings: An Overview

New insights on the influence of low frequency pulsed current on the characteristics of PEO coatings formed on AZ31B

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