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

Omar DagdagLaboratory of Agroresources, Polymers and Process Engineering, Department of Chemistry, Faculty of Science Ibn Tofail University BP 133, 14000 Kenitra MoroccoАвни БеришаDepartment of Chemistry, Faculty of Natural and Mathematics Science University of Prishtina 10000 Prishtina KosovoZaki SafiAl Azhar University‐Gaza Chemistry Department, Faculty of Science P.O Box 1277 Gaza PalestineOthman HamedDepartment of Chemistry An‐Najah National University P. O. Box 7 Nablus PalestineShehdeh JodehDepartment of Chemistry An‐Najah National University P. O. Box 7 Nablus PalestineChandrabhan VermaDepartment of Chemistry, Faculty of Natural and Agricultural Sciences, School of Chemical and Physical Sciences North‐West University, Private Bag X2046 Mmabatho 2735 South AfricaEno E. EbensoDepartment of Chemistry, Faculty of Natural and Agricultural Sciences, School of Chemical and Physical Sciences North‐West University, Private Bag X2046 Mmabatho 2735 South AfricaAhmed El HarfiLaboratory of Agroresources, Polymers and Process Engineering, Department of Chemistry, Faculty of Science Ibn Tofail University BP 133, 14000 Kenitra Morocco

2019en

ABI

Annotatsiya

ABSTRACT 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.cm 2 . 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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DOI: 10.1002/app.48402

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