Sol-gel alumina coating of wire mesh packing

Mohamed Abdelraouf, Josef Hegarty, Allan Rennie, Rémi Elizalde, Neil Burns, Louise Geekie, Vesna Najdanovic, Farid Aiouache

Research output: Contribution to journalArticle

Abstract

Wire mesh packings have seen increasing applications to multiphase processes in recent years. Despite the high surface area, open structure and thermal and chemical resistance, wire mesh packings have a complex geometry which hinders some chemical applications, including changes of surface properties through application of a uniformly adhesive coating. In this work, the sol-gel deposition method of alumina coating ceramics was investigated for the first time on stainless steel wire mesh by using Dixon rings as example. The kinetics of deposition during the hydrolysis and polycondensation was followed for a range of initial composition of the coating such as the ratios of Al 2O 3 to water, acid content, polyethyleneimine binder content and the number of deposition cycles. Well-adhered alumina with a thickness up to 20 μm was successfully deposited. The molar ratios of acid to alumina and alumina to water of 0.25 and 0.01, respectively, 48 h of the aging time, 96 h of the mixing time and 2.1 g/L of polyethyleneimine binder formed a free of cracks coating of controlled thickness alumina on the Dixon rings.

Original languageEnglish
Pages (from-to)20777-20787
Number of pages11
JournalCeramics International
Volume46
Issue number13
Early online date11 May 2020
DOIs
Publication statusPublished - Sep 2020

Bibliographical note

© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Alumina ceramics coating
  • Column packing
  • Dixon ring
  • Sol-gel
  • Stainless steel coating
  • Wire mesh coating

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    Abdelraouf, M., Hegarty, J., Rennie, A., Elizalde, R., Burns, N., Geekie, L., Najdanovic, V., & Aiouache, F. (2020). Sol-gel alumina coating of wire mesh packing. Ceramics International, 46(13), 20777-20787. https://doi.org/10.1016/j.ceramint.2020.05.043