Corrosion behavior of functionally graded and self-healing nanostructured TiO2–Al2O3 - Benzotriazole coatings deposited on AA 2024-T3 by the sol-gel method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Article number122233
Journal / PublicationMaterials Chemistry and Physics
Volume240
Online published30 Sep 2019
Publication statusPublished - 15 Jan 2020

Abstract

The corrosion behavior of titania-alumina-Benzotriazole and functionally graded (FG) coatings deposited on AA 2024-T3 is investigated. The FG coatings are doped with different amounts of Benzotriazole (BTA) as an inhibitor and the Al2O3–TiO2-BTA coating has a similar amount of BTA in the layers. The coatings are deposited by the sol-gel and dip-coating techniques and the morphology, structure, and corrosion resistance are investigated systematically. The amorphous TiO2–Al2O3-BTA and FG coatings with thicknesses of 2.3 and 2.6 μm show corrosion resistance of 105,672 Ω Cm2 and 252,731Ω. Cm2, respectively, after immersion in 3.5% NaCl for 96 h. The difference is caused by controllable release of BTA from the FG coatings. The results show that the FG coatings are superior to conventional nanostructured TiO2–Al2O3-BTA coatings from the perspective of corrosion protection.

Research Area(s)

  • Corrosion resistance, Electrochemical impedance spectroscopy, Functionally graded coating, Nanostructured TiO2–Al2O3-BTA coating, Sol-gel

Citation Format(s)

Corrosion behavior of functionally graded and self-healing nanostructured TiO2–Al2O3 - Benzotriazole coatings deposited on AA 2024-T3 by the sol-gel method. / Simbar, Ali Reza; Shanaghi, Ali; Moradi, Hadi; Chu, Paul K.

In: Materials Chemistry and Physics, Vol. 240, 122233, 15.01.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal