Description

In this study, three Gr/AgNW-based, Fe-C coated long period fiber gratings (LPFG) corrosion sensors were prepared and tested for corrosion-induced mass loss measurements under various strain levels. Graphene grew on a copper foil using a low pressure chemical vapor deposition, was transferred to the curve surface of each LPFG sensor, and strengthened by silver nanowire (AgNW) for a more robust electroplating process of the Fe-C layer. The three Fe-C coated LPFG sensors were subjected to three different strain levels: 0, 500 and 1000 με. The sensors were immersed up to 72 hours in 3.5% w.t NaCl solution. Both optical transmission spectra and electrical impedance spectroscopy (EIS) data were simultaneously collected from each Fe-C coated sensor. Compared with the zero-strained sensor, the strained sensors increased their sensitivity by approximately 133% and 182% in Stage I, but reduced to 49% and 24% in Stage II at strain levels of 500 με and 100 με, respectively.

Location

St. Louis, Missouri

Start Date

8-6-2019 3:35 PM

End Date

8-6-2019 3:55 PM

Meeting Name

INSPIRE-UTC 2019 Annual Meeting

Department(s)

Civil, Architectural and Environmental Engineering

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type

text

Language(s)

English

Source Publication Title

Proceedings of the 9th International Conference on Structural Health Monitoring of Intelligent Infrastructure (2019: Aug. 4-7, St. Louis, MO)

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Aug 6th, 3:35 PM Aug 6th, 3:55 PM

Corrosion Induced Mass Loss Measurement under Various Strain Levels through Gr/AgNW-based, Fe-C Coated LPFG Sensors

St. Louis, Missouri

In this study, three Gr/AgNW-based, Fe-C coated long period fiber gratings (LPFG) corrosion sensors were prepared and tested for corrosion-induced mass loss measurements under various strain levels. Graphene grew on a copper foil using a low pressure chemical vapor deposition, was transferred to the curve surface of each LPFG sensor, and strengthened by silver nanowire (AgNW) for a more robust electroplating process of the Fe-C layer. The three Fe-C coated LPFG sensors were subjected to three different strain levels: 0, 500 and 1000 με. The sensors were immersed up to 72 hours in 3.5% w.t NaCl solution. Both optical transmission spectra and electrical impedance spectroscopy (EIS) data were simultaneously collected from each Fe-C coated sensor. Compared with the zero-strained sensor, the strained sensors increased their sensitivity by approximately 133% and 182% in Stage I, but reduced to 49% and 24% in Stage II at strain levels of 500 με and 100 με, respectively.