Assessment of anti-corrosion coatings adhesion using terahertz time domain reflection spectroscopy

Daniel Tobar, Sri Kambhampati, Thunyaluk Pojtanabuntoeng, Vincent P. Wallace

Research output: Chapter in Book/Conference paperConference paperpeer-review

Abstract

Corrosion is a significant economic problem, accounting for up to 5% of the Global GDP. New coatings are being developed to prevent corrosion, but they must bond well with the metal surface, have a minimal thickness, and not delaminate over time. Coating adhesion is crucial for the coating system to attain its design lifetime. Coatings applied following the manufacturer's recommendations generally offer good adhesion to the substrate and can resist the permeation of corrosive agents. Coating adhesion depends on the coating property and substrate cleanliness, surface roughness, and any pre-treatments before coating application. The study evaluated the effects of surface roughness profile morphology and height on the pull-off adhesion strength value of the coating and its correlation with interfacial adhesion at the coating and substrate. The results show that delamination of coatings on steel used to protect the material from corrosion can be detected using terahertz reflection spectroscopy. The THz data agree well with standard industry pull-off testing. The study provides evidence that THz reflection spectroscopy can be used for non-destructive testing of anticorrosion coatings and the aging process.

Original languageEnglish
Title of host publicationIRMMW-THz 2023 - 48th Conference on Infrared, Millimeter, and Terahertz Waves
Place of PublicationUSA
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Electronic)9798350336603
DOIs
Publication statusPublished - 2023
Event48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada
Duration: 17 Sept 202322 Sept 2023

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

Conference48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Country/TerritoryCanada
CityMontreal
Period17/09/2322/09/23

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