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Desorption of carboxylates and phosphonates from galvanized steel: Towards greener lubricants

Donald Hill, Peter Holliman Orcid Logo, Eurig W. Jones, James McGettrick, David Worsley Orcid Logo, Marco Appleman, Pranesh Chatterjee

Surface and Interface Analysis

Swansea University Authors: Peter Holliman Orcid Logo, David Worsley Orcid Logo

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DOI (Published version): 10.1002/sia.6681

Abstract

This paper studies the removal of chemisorbed carboxylates and phosphonates from TiO2‐coated galvanized steel using NaOH(aq). XPS and FTIR data show that NaOH(aq) is effective at desorbing these species and so is an alternative to gas phase processes (eg, plasma cleaning). Tribological investigation...

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Published in: Surface and Interface Analysis
ISSN: 01422421
Published: Wiley 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50778
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Abstract: This paper studies the removal of chemisorbed carboxylates and phosphonates from TiO2‐coated galvanized steel using NaOH(aq). XPS and FTIR data show that NaOH(aq) is effective at desorbing these species and so is an alternative to gas phase processes (eg, plasma cleaning). Tribological investigations show that NaOH(aq)‐treated surfaces show reduced friction and wear, relative to the “as‐received” galvanized steel. This is ascribed to carbonate (present as an impurity in NaOH) that adsorbs to the surface of the substrate during NaOH(aq) immersion. Carbonate removal through sonication in water generates surfaces that show friction similar to “as‐received” galvanized steel. This work is useful in areas (eg, automotive manufacturing), where the effective removal of lubricants following tribological contact is key to subsequent paint adhesion.
College: Faculty of Science and Engineering

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