Operando odd random phase electrochemical impedance spectroscopy (ORP-EIS) for in-situ monitoring of the Zr-based conversion coating growth in the presence of (in)organic additives

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Abstract

Operando odd random phase electrochemical impedance spectroscopy (ORP-EIS) is introduced as an in-situ monitoring tool to directly monitor the conversion treatment of zinc in a hybrid Zr-based solution containing aminosilane and Cu additives. SEM and EDX are applied to investigate the morphology and elemental composition of the oxide film. Results show that the operando ORP-EIS provides an opportunity to investigate the growth of the conversion layer and its surface homogeneity as well as the charge transfer reaction during conversion. Moreover, the presence of aminosilane in the Zr solution containing Cu improves the morphology and barrier properties of the conversion film.
Original languageEnglish
Article number111469
Number of pages10
JournalCorrosion Science
Volume223
Issue number10
DOIs
Publication statusPublished - Oct 2023

Bibliographical note

Funding Information:
Authors would like to thank BASF (Chemetall, Frankfurt) for providing chemicals and materials for the current research.

Publisher Copyright:
© 2023 Elsevier Ltd

Copyright:
Copyright 2023 Elsevier B.V., All rights reserved.

Keywords

  • Operando ORP-EIS
  • Conversion treatment
  • Zinc
  • Aminosilane
  • Additives

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