Mechanism and sensitivity of Fe-C coated long period fiber grating sensors for steel corrosion monitoring of RC structures. (October 2017)

• Record Type: Journal Article
• Authors: Chen, Yizheng; Tang, Fujian; Tang, Yan; O'Keefe, Matthew J.; Chen, Genda
• Is Part Of: Corrosion science. Volume 127(2017)
• Page Start: 70
• Page End: 81
• Publication Date: 2017-10
• Subjects: Iron -- Sputtered films -- EIS -- SEM -- Pitting corrosion -- Rust; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2017.08.021
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The long period fiber grating corrosion sensor is coated with Ag and Fe-C layers. The corrosion sensitivity depends on the thickness of both Ag and Fe-C layers. The service life depends on the thickness of both Ag and Fe-C layers. The corrosion sensor can monitor corrosion loss up to different ranges. Abstract: The mechanism and sensitivity of long period fiber gratings (LPFG) corrosion sensor, which is made by coating LPFG with an inner layer of silver and an outer layer of Fe-C, are investigated in this study. Two silver and three Fe-C thicknesses were considered. Results indicate that a linear relationship is present between the change in the resonant wavelength and the mass loss of the outer Fe-C layer within certain ranges. The corrosion sensitivity and service life of LPFG corrosion sensor depend on the thickness of both silver and Fe-C layers.