Aerospace Defense

Synthesis and Microstructural/Electrochemical Characterization of Natural‑Inhibitor‑Modified Epoxy Coatings Applied on Aluminum Alloys 2024 and 7075

Document Type : Original Article

Authors

hossein doosti irani 1
sara sadat hashemi 2
ehsan sorati ashtiani 3

1 Master student

2 Department of Materials Engineering, Hakim Sabzevari University, Sabzevar, Iran

3 department of UAV

Abstract
In this study, the performance of anticorrosion coatings was evaluated through an integrated approach combining standards analysis, IRIA F operational data, and aircraft case studies. The results of potentiodynamic polarization and EIS tests in a 3.5 wt.% sodium chloride solution showed that the epoxy coating containing mandarin peel extract achieved protection efficiencies of 94% and 93% for aluminum alloys 2024 and 7075, respectively. Microscopic analyses and FTIR confirmed the stability of the coating, while MD simulations revealed the inhibitor adsorption mechanism. Based on these findings, practical guidelines were proposed for inspection, application of anticorrosion coatings, and optimization of storage conditions to enhance aircraft service life and operational readiness.

Keywords

Corrosion
Aluminum alloy
Al2024
Al7075
Epoxy coating
Tangerine peel extract

Subjects

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Aerospace Defense
Volume 4, Issue 3
Winter 2026
Pages 48-65

  • Receive Date 10 February 2026
  • Revise Date 05 May 2026
  • Accept Date 08 May 2026

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