Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel

Watkins, Evan; Griffiths, Christian; Batchelor, Chris; Barker, Peter; Carnie, Matt

doi:10.3390/coatings13060982

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Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel

Evan Watkins

, Christian Griffiths, Chris Batchelor, Peter Barker, Matt Carnie

Coatings, Volume: 13, Issue: 6, Start page: 982

Swansea University Authors: Evan Watkins , Christian Griffiths, Chris Batchelor, Matt Carnie

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DOI (Published version): 10.3390/coatings13060982

Abstract

Clearcoats provide long-term aesthetics and protection for underlying coating systems, increasing product lifetimes. However, organic clearcoats are predominantly produced using fossil-fuel feedstocks. In search of a sustainable alternative, an experimental investigation was conducted on the develop...

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Published in:	Coatings
ISSN:	2079-6412
Published:	MDPI AG 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63543

first_indexed	2023-06-01T10:31:11Z
last_indexed	2024-11-15T18:01:48Z
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spelling	2024-10-18T16:57:25.7782158 v2 63543 2023-05-30 Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel ac8763e21b39071c449e017bcb8e2299 0009-0000-5202-2357 Evan Watkins Evan Watkins true false 6ec8aad26102e4a1c7b00c1832471424 Christian Griffiths Christian Griffiths true false dc25fd16f433418f99e6f6b27d8a5b02 Chris Batchelor Chris Batchelor true false 73b367694366a646b90bb15db32bb8c0 0000-0002-4232-1967 Matt Carnie Matt Carnie true false 2023-05-30 Clearcoats provide long-term aesthetics and protection for underlying coating systems, increasing product lifetimes. However, organic clearcoats are predominantly produced using fossil-fuel feedstocks. In search of a sustainable alternative, an experimental investigation was conducted on the development of glass-like clearcoats produced using the sol-gel process. The processing of sol-gel clearcoats over a pigmented polyurethane coating was studied by modifying the sol-gel solution pH, aging, curing, precursor chemistry, and deposition techniques. Under optimal formulation and processing conditions, defect-free sol-gel clearcoats were produced that have potential to be scaled up to a coil-coating line using existing technologies. Mechanical testing demonstrated the coatings had excellent adhesion, hardness, and flexibility. Furthermore, accelerated laboratory weathering tests revealed the sol-gel coatings had superior degradation resistance compared to the organic coatings tested, resulting in negligible colour changes and higher gloss retention after 4000 hours of exposure. The durability and environmental benefits of sol-gel clearcoats highlight their potential as a replacement for traditional organic clearcoats in a variety of applications. Journal Article Coatings 13 6 982 MDPI AG 2079-6412 Glass clearcoats, sol-gel process, organic-inorganic hybrids, weathering, degradation, 24 coil-coating, sustainability 25 5 2023 2023-05-25 10.3390/coatings13060982 COLLEGE NANME COLLEGE CODE Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) The authors would like to acknowledge the COATED M2A funding from the European 532 Social Fund via the Welsh Government (c80816), the Engineering and Physical Sciences Research 533 Council (Grant Ref: EP/S02252X/1) and Tata Steel UK that has made this research possible. 2024-10-18T16:57:25.7782158 2023-05-30T08:35:21.1591043 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Evan Watkins 0009-0000-5202-2357 1 Christian Griffiths 2 Chris Batchelor 3 Peter Barker 4 Matt Carnie 0000-0002-4232-1967 5 63543__27695__7858fe3ddb654e3d9569f7a51c12cca2.pdf 63543.VOR.pdf 2023-06-03T11:12:58.2356118 Output 4451579 application/pdf Version of Record true © 2023 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. true eng https://creativecommons.org/licenses/by/4.0/
title	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
spellingShingle	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel Evan Watkins Christian Griffiths Chris Batchelor Matt Carnie
title_short	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
title_full	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
title_fullStr	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
title_full_unstemmed	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
title_sort	Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel
author_id_str_mv	ac8763e21b39071c449e017bcb8e2299 6ec8aad26102e4a1c7b00c1832471424 dc25fd16f433418f99e6f6b27d8a5b02 73b367694366a646b90bb15db32bb8c0
author_id_fullname_str_mv	ac8763e21b39071c449e017bcb8e2299_*_Evan Watkins 6ec8aad26102e4a1c7b00c1832471424__Christian Griffiths dc25fd16f433418f99e6f6b27d8a5b02__Chris Batchelor 73b367694366a646b90bb15db32bb8c0_*_Matt Carnie
author	Evan Watkins Christian Griffiths Chris Batchelor Matt Carnie
author2	Evan Watkins Christian Griffiths Chris Batchelor Peter Barker Matt Carnie
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description	Clearcoats provide long-term aesthetics and protection for underlying coating systems, increasing product lifetimes. However, organic clearcoats are predominantly produced using fossil-fuel feedstocks. In search of a sustainable alternative, an experimental investigation was conducted on the development of glass-like clearcoats produced using the sol-gel process. The processing of sol-gel clearcoats over a pigmented polyurethane coating was studied by modifying the sol-gel solution pH, aging, curing, precursor chemistry, and deposition techniques. Under optimal formulation and processing conditions, defect-free sol-gel clearcoats were produced that have potential to be scaled up to a coil-coating line using existing technologies. Mechanical testing demonstrated the coatings had excellent adhesion, hardness, and flexibility. Furthermore, accelerated laboratory weathering tests revealed the sol-gel coatings had superior degradation resistance compared to the organic coatings tested, resulting in negligible colour changes and higher gloss retention after 4000 hours of exposure. The durability and environmental benefits of sol-gel clearcoats highlight their potential as a replacement for traditional organic clearcoats in a variety of applications.
published_date	2023-05-25T12:53:57Z
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score	11.059359

Processing and Weathering of Sol-Gel Clearcoats for Coil-Coated Steel

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