Exploring the effect of the pH on the corrosion of multilayer nickel-chromium coatings

Jesús Manuel Vega*, Larraitz Ganborena, Yaiza Gonzalez-Garcia, Berkem Özkaya, Hans Jürgen Grande, Eva García-Lecina

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The impact of the pH on the corrosion of microporous nickel-chromium coatings has been explored at localised scale by Scanning Electrochemical Microscopy and validated by potentiodynamic polarisation measurements. Results not only reveal the correlation between both techniques but also enables to identify the different corrosion rate after increasing the electrolyte aggressiveness varying the pH. However, independently of the pH, a similar corrosion mechanism was determined: the cross-section micrographs (by Field Emission-Scanning Electron Microscope) have revealed an isotropic growth of the actives sites at early-stage corrosion as well as the attack of different nickel layers during the corrosion propagation.

Original languageEnglish
Article number110819
Number of pages11
JournalCorrosion Science
Volume210
DOIs
Publication statusPublished - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Acidic solutions
  • Electrodeposited films
  • Metal coatings
  • Oxygen reduction
  • Polarisation
  • SEM

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