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A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’

Natalie Wint, P. Ansell, J. Edy, Geraint Williams Orcid Logo, Hamilton McMurray

Journal of The Electrochemical Society, Volume: 166, Issue: 15, Pages: C580 - C588

Swansea University Authors: Natalie Wint, Geraint Williams Orcid Logo, Hamilton McMurray

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DOI (Published version): 10.1149/2.1021914jes

Abstract

Corrosion inhibitive pigments, based on the cations Ce4+ and Cr3+ exchanged into smart release resins, are dispersed in a polyvinyl butyral (PVB) model coating and applied to a hot dip galvanised steel (HDG) substrate. An investigation is made into the influence of different pigment volume fractions...

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Published in: Journal of The Electrochemical Society
ISSN: 0013-4651 1945-7111
Published: The Electrochemical Society 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa52358
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spelling 2019-10-07T12:04:22.8114748 v2 52358 2019-10-07 A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’ 5be5dcc4b97c78b3063e258add4fff5c Natalie Wint Natalie Wint true false 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 56fc1b17ffc3bdf6039dc05c6eba7f2a Hamilton McMurray Hamilton McMurray true false 2019-10-07 FGSEN Corrosion inhibitive pigments, based on the cations Ce4+ and Cr3+ exchanged into smart release resins, are dispersed in a polyvinyl butyral (PVB) model coating and applied to a hot dip galvanised steel (HDG) substrate. An investigation is made into the influence of different pigment volume fractions (øpig) of Ce(IV) and Cr(III) based inhibitors, used both in isolation and combination, on the kinetics and mechanism of corrosion driven cathodic coating delamination. The rate of coating delamination is obtained using scanning Kelvin probe (SKP) potentiometry and time lapse photography, and the efficiency with which each inhibitor combination is able to resist cathodic coating delamination is calculated. Isobolograms, commonly utilized within the field of drug interaction, are presented as an effective method for characterising corrosion inhibitor interactions. In some cases, the sum of the efficiencies calculated for Ce(IV) and Cr(III) based pigments is shown to be greater than the sum of their individual efficiencies. It is proposed that Ce4+, released upon electrolyte exposure, is able to oxidize the Cr3+ species resulting in the formation of transient CrO4−2. Journal Article Journal of The Electrochemical Society 166 15 C580 C588 The Electrochemical Society 0013-4651 1945-7111 corrosion 31 12 2019 2019-12-31 10.1149/2.1021914jes http://dx.doi.org/10.1149/2.1021914jes COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2019-10-07T12:04:22.8114748 2019-10-07T11:56:57.7051637 Natalie Wint 1 P. Ansell 2 J. Edy 3 Geraint Williams 0000-0002-3399-5142 4 Hamilton McMurray 5 52358__16201__ae0ab646b2804685b18cb3e6691a75ad.pdf wint2019.pdf 2020-01-06T13:31:25.8660060 Output 1267424 application/pdf Version of Record true 2020-01-06T00:00:00.0000000 false © The Author(s) 2019. Published by ECS. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
title A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
spellingShingle A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
Natalie Wint
Geraint Williams
Hamilton McMurray
title_short A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
title_full A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
title_fullStr A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
title_full_unstemmed A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
title_sort A Method for Quantifying the Synergistic Inhibitory Effect of Corrosion Inhibitors When Used in Combination: A ‘Chromate Generating Coating’
author_id_str_mv 5be5dcc4b97c78b3063e258add4fff5c
0d8fc8d44e2a3c88ce61832f66f20d82
56fc1b17ffc3bdf6039dc05c6eba7f2a
author_id_fullname_str_mv 5be5dcc4b97c78b3063e258add4fff5c_***_Natalie Wint
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray
author Natalie Wint
Geraint Williams
Hamilton McMurray
author2 Natalie Wint
P. Ansell
J. Edy
Geraint Williams
Hamilton McMurray
format Journal article
container_title Journal of The Electrochemical Society
container_volume 166
container_issue 15
container_start_page C580
publishDate 2019
institution Swansea University
issn 0013-4651
1945-7111
doi_str_mv 10.1149/2.1021914jes
publisher The Electrochemical Society
url http://dx.doi.org/10.1149/2.1021914jes
document_store_str 1
active_str 0
description Corrosion inhibitive pigments, based on the cations Ce4+ and Cr3+ exchanged into smart release resins, are dispersed in a polyvinyl butyral (PVB) model coating and applied to a hot dip galvanised steel (HDG) substrate. An investigation is made into the influence of different pigment volume fractions (øpig) of Ce(IV) and Cr(III) based inhibitors, used both in isolation and combination, on the kinetics and mechanism of corrosion driven cathodic coating delamination. The rate of coating delamination is obtained using scanning Kelvin probe (SKP) potentiometry and time lapse photography, and the efficiency with which each inhibitor combination is able to resist cathodic coating delamination is calculated. Isobolograms, commonly utilized within the field of drug interaction, are presented as an effective method for characterising corrosion inhibitor interactions. In some cases, the sum of the efficiencies calculated for Ce(IV) and Cr(III) based pigments is shown to be greater than the sum of their individual efficiencies. It is proposed that Ce4+, released upon electrolyte exposure, is able to oxidize the Cr3+ species resulting in the formation of transient CrO4−2.
published_date 2019-12-31T04:04:40Z
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score 11.013148

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