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Influence of uniaxial deformation on surface morphology and corrosion performance of chromium-based coatings for packaging steel

JORDAN WHITESIDE, Arnoud C.A. de Vooys, Elizabeth Sackett Orcid Logo, Hamilton McMurray

Corrosion Science, Volume: 190, Start page: 109662

Swansea University Authors: JORDAN WHITESIDE, Elizabeth Sackett Orcid Logo, Hamilton McMurray

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Abstract

Chromium-based coatings on steel, cathodically electroplated from Cr(VI) and Cr(III) electrolytes, were studied to compare their corrosion resistance following application of uniaxial strain. An organic overcoat (PVB) was applied to strained samples and an in-situ scanning Kelvin probe technique was...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa57282
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Abstract: Chromium-based coatings on steel, cathodically electroplated from Cr(VI) and Cr(III) electrolytes, were studied to compare their corrosion resistance following application of uniaxial strain. An organic overcoat (PVB) was applied to strained samples and an in-situ scanning Kelvin probe technique was used to determine rates of PVB cathodic disbondment. The Cr(VI) derived coatings were fully resistant to cathodic disbondment post-deformation. The Cr(III) derived coatings exhibited increased rates of cathodic disbondment with increasing uniaxial strain. The Kinetics of cathodic disbondment are explained on the basis of coating morphology produced by deformation, and the exposure of underlying iron. The electrochemical availability of iron is estimated by measuring hydrogen evolution kinetics on cathodically polarised samples.
Keywords: steel, Chromium, Cathodic disbondment, Oxygen reduction, Packaging Steels, Uniaxial Deformation
College: College of Engineering
Funders: The authors would like to thank TATA Steel, and the M2A & COATED2 CDT financial support from the European Social Fund via the Welsh Government (<GN3>c80816<GN3>) and the Engineering and Physical Sciences Research Council (Grant Ref: EP/L015099/1). The work was further supported by the Advanced Imaging of Materials (AIM) Facility at Swansea University.
Start Page: 109662