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Nanomechanical and nano-FTIR analysis of polyester coil coatings before and after artificial weathering experiments
RISE Research Institutes of Sweden, Materials and Production, Corrosion. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0001-6438-1357
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.ORCID iD: 0000-0001-6877-9282
KTH Royal Institute of Technology, Sweden.
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2024 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 190, article id 108355Article in journal (Refereed) Published
Abstract [en]

Local heterogeneities can have significant effects on the performance of anti-corrosion coatings. Even small features can act as initiation points for damage and result in corrosion of the substrate material. Analysis methods with high spatial resolution and the ability to collect information relevant to crosslinking and degradation behavior of these coatings are therefore highly relevant. In this work, we demonstrate the utility of nanomechanical AFM measurements and nano-FTIR in investigating the nanoscale mechanical and chemical properties of two polyester coil coating clearcoats before and after weathering. On the nanoscale, weathering led to a stiffer and less deformable coating with less variation in the nanomechanical properties. Chemical degradation was quantified using changes in band ratios in the IR-spectra. Macro and nano-scale measurements showed similar trends with the latter measurements showing larger heterogeneity. Our results demonstrate the usefulness of the described analysis techniques and will pave the way for future studies of local properties in other coating systems and formulations. © 2024 The Authors

Place, publisher, year, edition, pages
Elsevier B.V. , 2024. Vol. 190, article id 108355
Keywords [en]
Corrosion resistant coatings; Crosslinking; Nanotechnology; Weathering; Artificial weathering; Coil coatings; FTIR; FTIR analysis; Local heterogeneity; Nano scale; Nano-FTIR; Nanomechanical; Nanomechanical property; Fourier transform infrared spectroscopy
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Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-72754DOI: 10.1016/j.porgcoat.2024.108355Scopus ID: 2-s2.0-85188822290OAI: oai:DiVA.org:ri-72754DiVA, id: diva2:1858310
Note

This work was supported by the Swedish Foundation for Strategic Research (SSF) grant FID18-0034.

Available from: 2024-05-16 Created: 2024-05-16 Last updated: 2024-05-16Bibliographically approved

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Wärnheim, AlexanderDobryden, IlliaEdvinsson, CamillaPersson, Dan

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