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- Title
Non-Destructive Subsurface Inspection of Marine and Protective Coatings Using Near- and Mid-Infrared Optical Coherence Tomography.
- Authors
Petersen, Christian R.; Rajagopalan, Narayanan; Markos, Christos; Israelsen, Niels M.; Rodrigo, Peter J.; Woyessa, Getinet; Tidemand-Lichtenberg, Peter; Pedersen, Christian; Weinell, Claus E.; Kiil, Søren; Bang, Ole
- Abstract
Near- and mid-infrared optical coherence tomography (OCT) is evaluated as a non-destructive and non-contact reflection imaging modality for inspection of industrial and marine coatings. Near-infrared OCT was used to obtain high-resolution images (~6/2 µm lateral/axial) of hidden subsurface cracks and defects in a resin base coating, which had been exposed to high pressure and high temperature to study coating degradation in hostile environments. Mid-infrared OCT was employed for high-resolution (~15/8.5 µm lateral/axial) subsurface inspection of highly scattering marine coatings, demonstrating monitoring of wet film thickness and particle dispersion during curing of a 210 µm layer of antifouling coating, and detection of substrate corrosion through 369 µm of high-gloss alkyd enamel. Combining high-resolution and fast, non-invasive scanning, OCT is therefore considered a promising tool for studying coating performance and for industrial inspection.
- Subjects
SURFACE coatings; PROTECTIVE coatings; THERMOGRAPHY; ANTIFOULING paint; HIGH temperatures
- Publication
Coatings (2079-6412), 2021, Vol 11, Issue 8, p877
- ISSN
2079-6412
- Publication type
Article
- DOI
10.3390/coatings11080877