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Title: Experimental investigation of corrosion monitoring on duplex-coated steel utilizing distributed fiber optic sensors
Civil engineering structures are routinely exposed to corrosive environments, posing threats to their structural integrity. Traditional corrosion control methods often involve employing physical barriers, such as various coatings, to isolate the steel substrate from surrounding electrolytes. Among these methods, thermal spraying of alloy coatings has emerged as a prominent technique in safeguarding steel matrices against corrosion, particularly in industrial and marine settings. However, the inherent porosity of thermal spraying coatings compromises their corrosion resistance. Incorporating a polymer top layer offers a promising solution by sealing pores and augmenting overall performance. This study investigates corrosion on duplex-coated steel utilizing distributed fiber optic sensors based on optical frequency domain reflectometry. Experimental analyses involve embedding serpentine-arranged distributed fiber optic strain sensors within both thermal spraying layers and epoxy layers. Results demonstrate the efficiency of distributed sensors in identifying corrosion propagation paths by measuring the induced strain changes. Furthermore, the duplex coating exhibits significant enhancements in corrosion resistance for steel structures.  more » « less
Award ID(s):
1750316
PAR ID:
10523805
Author(s) / Creator(s):
; ; ;
Editor(s):
Limongelli, Maria Pina; Ng, Ching Tai; Glisic, Branko
Publisher / Repository:
SPIE
Date Published:
ISBN:
9781510672048
Page Range / eLocation ID:
53
Format(s):
Medium: X
Location:
Long Beach, United States
Sponsoring Org:
National Science Foundation
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