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Wärnheim, A., Kotov, N., Dobryden, I., Telaretti Leggieri, R., Edvinsson, C., Heydari, G., . . . Claesson, P. M. (2024). Nanomechanical and nano-FTIR analysis of polyester coil coatings before and after artificial weathering experiments. Progress in organic coatings, 190, Article ID 108355.
Open this publication in new window or tab >>Nanomechanical and nano-FTIR analysis of polyester coil coatings before and after artificial weathering experiments
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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
Keywords
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
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-72754 (URN)10.1016/j.porgcoat.2024.108355 (DOI)2-s2.0-85188822290 (Scopus ID)
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
Persson, D., Heydari, G., Edvinsson, C. & Sundell, P. E. (2020). Depth-resolved FTIR focal plane array (FPA) spectroscopic imaging of the loss of melamine functionality of polyester melamine coating after accelerated and natural weathering. Polymer testing, 86, Article ID 106500.
Open this publication in new window or tab >>Depth-resolved FTIR focal plane array (FPA) spectroscopic imaging of the loss of melamine functionality of polyester melamine coating after accelerated and natural weathering
2020 (English)In: Polymer testing, ISSN 0142-9418, E-ISSN 1873-2348, Vol. 86, article id 106500Article in journal (Refereed) Published
Abstract [en]

FTIR-ATR (Focal Plane Array) FPA spectroscopic imaging was used to obtain depth resolved information about degradation of a polyester melamine coating by performing measurements on drilled conical holes. The results of the FTIR-FPA imaging show that combined effect of UV and moisture resulted in larger degradation effects in the outermost parts of the coatings but loss of melamine functionality was detected to the depth of approximately 8–10 μm after 2163 h weathering in QUVA accelerated test and after 4 years exposure in a marine environment. Longer periods of accelerated weathering, up to 4000 h, resulted in degradation through the whole coating outer layer.

Place, publisher, year, edition, pages
Elsevier Ltd, 2020
Keywords
Accelerated weathering, Coil coating, Degradation, Depth profiling, Field exposure, FTIR focal plane array imaging, Polyester melamine, Coatings, Focal plane arrays, Focusing, Thallium alloys, Coil coatings, Degradation effect, Natural weathering, Polyester-melamine, Polyester-melamine coatings, Spectroscopic imaging, Weathering
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-44711 (URN)10.1016/j.polymertesting.2020.106500 (DOI)2-s2.0-85082389884 (Scopus ID)
Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2024-05-16Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-5982-2760

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