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

doi:10.1016/j.corsci.2022.110819

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

Team Yaiza Gonzalez Garcia

Research output: Contribution to journal › Article › Scientific › peer-review

4 Citations (Scopus)

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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 language	English
Article number	110819
Number of pages	11
Journal	Corrosion Science
Volume	210
DOIs	https://doi.org/10.1016/j.corsci.2022.110819
Publication status	Published - 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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10.1016/j.corsci.2022.110819

1-s2.0-S0010938X22007375-mainFinal published version, 5.3 MB

Cite this

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title = "Exploring the effect of the pH on the corrosion of multilayer nickel-chromium coatings",

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.",

keywords = "Acidic solutions, Electrodeposited films, Metal coatings, Oxygen reduction, Polarisation, SEM",

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doi = "10.1016/j.corsci.2022.110819",

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journal = "Corrosion Science",

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AU - Ganborena, Larraitz

AU - Gonzalez-Garcia, Yaiza

AU - Özkaya, Berkem

AU - Grande, Hans Jürgen

AU - García-Lecina, Eva

N1 - 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.

PY - 2023

Y1 - 2023

N2 - 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.

AB - 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.

KW - Acidic solutions

KW - Electrodeposited films

KW - Metal coatings

KW - Oxygen reduction

KW - Polarisation

KW - SEM

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JO - Corrosion Science

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

Abstract

Bibliographical note

Keywords

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