Title

Application of Fe-C Coated LPFG Sensor for Early Stage Corrosion Monitoring of Steel Bar in RC Structures

Abstract

Fe-C coated long period fiber grating (LPFG) sensor was employed to monitor the corrosion-induced mass loss of steel bar in 3.5 wt% NaCl solution and steel bar in mortar cylinder. A two-stage process of the change in resonant wavelength as a function of the corrosion-induced mass loss of steel bar was observed. The LPFG sensor can effectively monitor steel bar corrosion loss in 3.5 wt% NaCl solution for 14 h with a sensitivity of 0.124 mg/nm change of the resonant wavelength, and in mortar cylinder for 14 days with a sensitivity of 0.405 mg/nm change of the resonant wavelength, respectively.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

INSPIRE - University Transportation Center

Comments

The authors gratefully acknowledge the financial support provided by the Fundamental Research Funds for the Central Universities of China (DUT17RC(3)076) and the US National Science Foundation (CMMI-1235202).

Keywords and Phrases

Bars (metal); Coatings; Cylinders (shapes); Diffraction gratings; Electrochemical corrosion; Mortar; Sodium alloys; Sodium chloride; Steel fibers; 3.5 wt% NaCl solution; Corrosion loss; Corrosion monitoring; Long period fiber grating; Long Period Gratings; Resonance wavelengths; Resonant wavelengths; Two-stage process; Steel corrosion; EIS; Long-period grating; LPR

International Standard Serial Number (ISSN)

0950-0618

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Elsevier, All rights reserved.

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