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Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications

Donald Hill, Peter Holliman Orcid Logo, James McGettrick Orcid Logo, Justin Searle, Marco Appelman, Pranesh Chatterjee, Trystan Watson Orcid Logo, David Worsley Orcid Logo

Lubrication Science

Swansea University Authors: Peter Holliman Orcid Logo, James McGettrick Orcid Logo, Trystan Watson Orcid Logo, David Worsley Orcid Logo

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DOI (Published version): 10.1002/ls.1370

Abstract

Surface lubricity on TiO2-coated galvanised steels can be controlled by solution depositing perfluorooctanoic (C8), lauric (C12) or stearic (C18) acids to avoid lubricating oils/emulsions or substrate pre-etching to remove surface oxide that add cost and waste. Water contact angles reveal increased...

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Published in: Lubrication Science
ISSN: 0954-0075
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa31547
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spelling 2017-02-02T11:07:18.4748771 v2 31547 2017-01-03 Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications c8f52394d776279c9c690dc26066ddf9 0000-0002-9911-8513 Peter Holliman Peter Holliman true false bdbacc591e2de05180e0fd3cc13fa480 0000-0002-7719-2958 James McGettrick James McGettrick true false a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false c426b1c1b0123d7057c1b969083cea69 0000-0002-9956-6228 David Worsley David Worsley true false 2017-01-03 MTLS Surface lubricity on TiO2-coated galvanised steels can be controlled by solution depositing perfluorooctanoic (C8), lauric (C12) or stearic (C18) acids to avoid lubricating oils/emulsions or substrate pre-etching to remove surface oxide that add cost and waste. Water contact angles reveal increased surface hydrophobicity on coated samples that correlate with linear friction testing, suggesting water contact angle can be used to screen lubricity compounds. Linear friction testing shows that C12 and C18 lower the coefficient of friction (μ) by 50–60% compared with uncoated substrates whilst C8 drops μ from 0.31 to 0.22. Surfaces have been characterised by X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy, whilst infrared confirms that as-deposited coatings contain physisorbed and deprotonated acids chemisorbed through esters and thermal gravimetric analysis confirms increasing loadings from C8 to C12 to C18. Surface washing removes physisorbed material and lowers μ by increasing surface organisation and alkyl chain packing that enhances frictional energy dissipation through steric quenching. Journal Article Lubrication Science 0954-0075 lubricity; friction; sorption; automotive steel; sheet metal forming 31 12 2017 2017-12-31 10.1002/ls.1370 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2017-02-02T11:07:18.4748771 2017-01-03T16:18:22.4876248 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Donald Hill 1 Peter Holliman 0000-0002-9911-8513 2 James McGettrick 0000-0002-7719-2958 3 Justin Searle 4 Marco Appelman 5 Pranesh Chatterjee 6 Trystan Watson 0000-0002-8015-1436 7 David Worsley 0000-0002-9956-6228 8 0031547-03012017162012.pdf hill2016.pdf 2017-01-03T16:20:12.7800000 Output 1424562 application/pdf Accepted Manuscript true 2018-01-24T00:00:00.0000000 false
title Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
spellingShingle Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
Peter Holliman
James McGettrick
Trystan Watson
David Worsley
title_short Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
title_full Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
title_fullStr Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
title_full_unstemmed Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
title_sort Studies of inherent lubricity coatings for low surface roughness galvanised steel for automotive applications
author_id_str_mv c8f52394d776279c9c690dc26066ddf9
bdbacc591e2de05180e0fd3cc13fa480
a210327b52472cfe8df9b8108d661457
c426b1c1b0123d7057c1b969083cea69
author_id_fullname_str_mv c8f52394d776279c9c690dc26066ddf9_***_Peter Holliman
bdbacc591e2de05180e0fd3cc13fa480_***_James McGettrick
a210327b52472cfe8df9b8108d661457_***_Trystan Watson
c426b1c1b0123d7057c1b969083cea69_***_David Worsley
author Peter Holliman
James McGettrick
Trystan Watson
David Worsley
author2 Donald Hill
Peter Holliman
James McGettrick
Justin Searle
Marco Appelman
Pranesh Chatterjee
Trystan Watson
David Worsley
format Journal article
container_title Lubrication Science
publishDate 2017
institution Swansea University
issn 0954-0075
doi_str_mv 10.1002/ls.1370
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
active_str 0
description Surface lubricity on TiO2-coated galvanised steels can be controlled by solution depositing perfluorooctanoic (C8), lauric (C12) or stearic (C18) acids to avoid lubricating oils/emulsions or substrate pre-etching to remove surface oxide that add cost and waste. Water contact angles reveal increased surface hydrophobicity on coated samples that correlate with linear friction testing, suggesting water contact angle can be used to screen lubricity compounds. Linear friction testing shows that C12 and C18 lower the coefficient of friction (μ) by 50–60% compared with uncoated substrates whilst C8 drops μ from 0.31 to 0.22. Surfaces have been characterised by X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy, whilst infrared confirms that as-deposited coatings contain physisorbed and deprotonated acids chemisorbed through esters and thermal gravimetric analysis confirms increasing loadings from C8 to C12 to C18. Surface washing removes physisorbed material and lowers μ by increasing surface organisation and alkyl chain packing that enhances frictional energy dissipation through steric quenching.
published_date 2017-12-31T03:38:33Z
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score 11.012678

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