A Fe-C Coated Long-Period Fiber Grating Sensor for Corrosion-Induced Mass Loss Measurement
This Letter reports a Fe-C coated long period fiber gratings sensor with a grating period of 387 ± 0.1 μm for corrosion monitoring of low carbon steel in a 3.5 wt. % NaCl solution. An LPFG sensor was first deposited with a 0.8 μm thick layer of silver (Ag) and then electroplated with a 20 μm thick Fe-C coating. The chemical composition of the Fe-C coating was designed to include the main elements of low carbon steel. The resonant wavelength of the coated sensor was correlated with the mass loss of steel over time. Test results indicated a corrosion sensitivity of 0.0423 nm per 1% mass loss up to 80% Fe-C mass loss and 0.576 nm per 1% mass loss between 80% and 95% Fe-C mass loss. The corrosion sensitivity of such a Fe-C coated LPFG sensor was a trade-off for the service life of the sensor, both depending on thicknesses of the inner silver layer and the outer Fe-C coating.
Y. Chen et al., "A Fe-C Coated Long-Period Fiber Grating Sensor for Corrosion-Induced Mass Loss Measurement," Optics Letters, vol. 41, no. 10, pp. 2213-2216, Optical Society of America, May 2016.
The definitive version is available at https://doi.org/10.1364/OL.41.002306
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Coatings; Corrosion Prevention; Economic And Social Effects; Low Carbon Steel; Silver; Steel Fibers; Chemical Compositions; Corrosion Monitoring; Grating Periods; Long Period Fiber Grating; Mass-Loss Measurement; NaCl Solution; Resonant Wavelengths; Silver Layer; Diffraction Gratings
International Standard Serial Number (ISSN)
Article - Journal
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