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The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment

Chris Griffiths, Natalie Wint, Geraint Williams Orcid Logo, Hamilton McMurray

Corrosion Science, Volume: 198, Start page: 110111

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

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DOI (Published version): 10.1016/j.corsci.2022.110111

Abstract

In-situ scanning Kelvin probe (SKP) measurements are used to investigate the relative contributions of in-coating zinc (II) cations and phosphate anions to the inhibition of corrosion-driven cathodic disbondment by zinc phosphate (ZnPhos) pigments. Using hot-dip galvanized steel (HDG) substrates, de...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59230
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spelling 2022-10-31T16:58:08.9781470 v2 59230 2022-01-24 The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment 6ec8aad26102e4a1c7b00c1832471424 Chris Griffiths Chris Griffiths true false 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 2022-01-24 MTLS In-situ scanning Kelvin probe (SKP) measurements are used to investigate the relative contributions of in-coating zinc (II) cations and phosphate anions to the inhibition of corrosion-driven cathodic disbondment by zinc phosphate (ZnPhos) pigments. Using hot-dip galvanized steel (HDG) substrates, delamination rates of model polyvinylbutyral (PVB) coatings comprising different pigment volume fractions (ϕ) of phosphate-loaded hydrotalcite and Zn(II)-exchanged bentonite are compared with those established in the presence of ZnPhos. The most powerful inhibitory effect is obtained using in-coating Zn2+, while ZnPhos pigments inhibit cathodic disbondment rather weakly and as such the principal function of phosphate is to control Zn2+ solubility. Journal Article Corrosion Science 198 110111 Elsevier BV 0010-938X A: metal coatings; organic coatings; zinc; C: atmospheric corrosion; paint coatings; polymer coatings 1 4 2022 2022-04-01 10.1016/j.corsci.2022.110111 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University SU Library paid the OA fee (TA Institutional Deal) Tata Steel Europe for providing samples, the M2A for supporting the project and the EPSRC for the funding for the Ph.D. studentship via an Industrial Case Award with Tata Steel Europe. (EP/L505699/1). 2022-10-31T16:58:08.9781470 2022-01-24T14:39:18.6943354 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Chris Griffiths 1 Natalie Wint 2 Geraint Williams 0000-0002-3399-5142 3 Hamilton McMurray 4 59230__24925__0494d1c8b9d14418a556f17a2c156402.pdf 59230.VOR.pdf 2022-08-15T14:49:35.8313944 Output 2436057 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution CC-BY 4.0 License. true eng http://creativecommons.org/licenses/by/4.0/
title The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
spellingShingle The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
Chris Griffiths
Natalie Wint
Geraint Williams
Hamilton McMurray
title_short The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
title_full The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
title_fullStr The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
title_full_unstemmed The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
title_sort The contribution of Zn(II) and phosphate anions to the inhibition of organic coating cathodic disbondment on galvanised steel by zinc phosphate pigment
author_id_str_mv 6ec8aad26102e4a1c7b00c1832471424
5be5dcc4b97c78b3063e258add4fff5c
0d8fc8d44e2a3c88ce61832f66f20d82
56fc1b17ffc3bdf6039dc05c6eba7f2a
author_id_fullname_str_mv 6ec8aad26102e4a1c7b00c1832471424_***_Chris Griffiths
5be5dcc4b97c78b3063e258add4fff5c_***_Natalie Wint
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray
author Chris Griffiths
Natalie Wint
Geraint Williams
Hamilton McMurray
author2 Chris Griffiths
Natalie Wint
Geraint Williams
Hamilton McMurray
format Journal article
container_title Corrosion Science
container_volume 198
container_start_page 110111
publishDate 2022
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2022.110111
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
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description In-situ scanning Kelvin probe (SKP) measurements are used to investigate the relative contributions of in-coating zinc (II) cations and phosphate anions to the inhibition of corrosion-driven cathodic disbondment by zinc phosphate (ZnPhos) pigments. Using hot-dip galvanized steel (HDG) substrates, delamination rates of model polyvinylbutyral (PVB) coatings comprising different pigment volume fractions (ϕ) of phosphate-loaded hydrotalcite and Zn(II)-exchanged bentonite are compared with those established in the presence of ZnPhos. The most powerful inhibitory effect is obtained using in-coating Zn2+, while ZnPhos pigments inhibit cathodic disbondment rather weakly and as such the principal function of phosphate is to control Zn2+ solubility.
published_date 2022-04-01T04:16:23Z
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