Comparison of Environmentally Benign Organic Acid Electrolytes for Anodization of AA2024-T3 Aircraft Alloy
Journal of the Electrochemical Society, cilt.173, sa.12, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 173 Sayı: 12
- Basım Tarihi: 2026
- Doi Numarası: 10.1149/1945-7111/ae77b1
- Dergi Adı: Journal of the Electrochemical Society
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Engineering Source (EBSCO)
- Anahtar Kelimeler: anodic films, coatings, corrosion protection
- Kocaeli Üniversitesi Adresli: Evet
Özet
Environmental and health concerns drive the search for environmentally benign anodizing electrolytes. This study presents a comparative assessment of anodic films formed on AA2024-T3 alloy in 0.5 M solutions of seven biocompatible organic acids. Anodization was performed at 15 mA cm−2 for 30 min at 20 °C following identical preliminary treatments. The influence of electrolyte composition on film barrier properties, surface morphology, wettability, and chemical composition was evaluated using Electrochemical Impedance Spectroscopy, Potentiodynamic Polarization, Optical Metallographic Microscopy, Scanning Electron Microscopy, sessile drop tests, and X-ray Photoelectron Spectroscopy. The obtained barrier abilities followed the order: malic > malonic > tartaric > citric > oxalic > maleic acid, while glycine exhibited a detrimental effect on film properties. Additional experiments were conducted on films produced in malic acid after thermal treatment in boiling distilled water for 30 min. Although the treatment slightly reduced barrier performance, it significantly improved repeatability by converting the surfaces from completely hydrophobic to fully hydrophilic. The relationships between electrolyte composition, surface characteristics, and corrosion-protective properties are systematically examined and discussed.