Quantitative assessment of heavy-duty anticorrosion coating thickness via near-infrared measurements

The application of heavy-duty anticorrosion coatings is a typical method for preventing corrosion in steel bridges. However, thus far, no efficient and quantitative inspection technique has been established that can remotely and non-destructively evaluate the remaining thickness of the top coat in a...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2023-09, Vol.138, p.102893, Article 102893
Main Authors: Sakata, Takumi, Kishigami, Shunsuke, Ogawa, Yuki, Arima, Noriyasu, Nishitani, Masahiro, Shiozawa, Daiki, Sakagami, Takahide
Format: Article
Language:English
Subjects:
Coating
Corrosion
Field inspection
Infrared thermography
Infrastructure
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Summary:The application of heavy-duty anticorrosion coatings is a typical method for preventing corrosion in steel bridges. However, thus far, no efficient and quantitative inspection technique has been established that can remotely and non-destructively evaluate the remaining thickness of the top coat in anticorrosion coatings. This study proposes a new inspection method called the "active self-reference lock-in near-infrared measurement method", which can accurately and quantitatively assess the remaining thickness of the top coat, irrespective of the lighting conditions. Experimental studies conducted on specimens and field studies carried out on on-site bridge measurements have confirmed the efficacy of the proposed method.
ISSN:0963-8695
DOI:10.1016/j.ndteint.2023.102893