Effects of high concentration of Benzotriazole on corrosion behavior of nanostructured titania-alumina composite coating deposited on Al 2024 by sol-gel method

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

21 Scopus Citations
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Author(s)

  • Maryam Sadat Sharifiyan
  • Ali Shanaghi
  • Hadi Moradi
  • Paul K. Chu

Detail(s)

Original languageEnglish
Pages (from-to)36-44
Journal / PublicationSurface and Coatings Technology
Volume321
Publication statusPublished - 15 Jul 2017

Abstract

Nanostructured titania-alumina coatings containing 1.2%, 3.6%, and 4.8% Benzotriazole as the self-healing agent are deposited on Al 2024 by the sol-gel method and dip coating. The phase composition and surface morphology are evaluated by XRD, FE-SEM, and AFM and the corrosion behavior is examined by electrochemical impedance spectroscopy and polarization tests in 3.5% NaCl solution for different immersion time periods of 1, 48, and 96 h. Uniform, homogeneous, and crack-free coatings with a thickness of about 3 μm are obtained. Release of Benzotriazole from the coatings blocks active sites and produces a barrier layer to improve the corrosion resistance of Al 2024. A protection efficiency of 76% is observed from the titania-alumina coating with 3.6% Benzotriazole and investigation of the impedance with immersion time confirms the self-healing behavior.

Research Area(s)

  • Al 2024, Benzotriazole, Corrosion behavior, Nanostructured titania-alumina coating, Sol-gel method

Citation Format(s)

Effects of high concentration of Benzotriazole on corrosion behavior of nanostructured titania-alumina composite coating deposited on Al 2024 by sol-gel method. / Sharifiyan, Maryam Sadat; Shanaghi, Ali; Moradi, Hadi; Chu, Paul K.

In: Surface and Coatings Technology, Vol. 321, 15.07.2017, p. 36-44.

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